GJ 1151: Difference between revisions

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Revision as of 18:30, 20 February 2023 editCitation bot (talk \| contribs)Bots5,445,340 edits Alter: doi. \| Use this bot. Report bugs. \| Suggested by Corvus florensis \| #UCB_webform 2571/3500← Previous edit		Revision as of 02:32, 8 May 2023 edit undoSevenSpheres (talk \| contribs)Extended confirmed users6,696 edits GJ 1151 c, not bNext edit →
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	{{Starbox image		{{Starbox image
	\| image = ]		\| image = ]
	\| caption = Artist's impression of GJ 1151 and GJ ~~1151~~ b.		\| caption = Artist's impression of GJ 1151 and an orbiting planet
	\| credit = <!--credit for image if the image's use requires them (optional)-->
	}}		}}
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	'''GJ 1151''' is a ] located in the northern ] of ] at a distance of 26.2~~ ]s~~ from the ]. It has a reddish hue and is too faint to be visible to the naked eye with an ] of 14.0<ref name=Houdebine2019/> The star is moving closer with a ] of −36 km/s,<ref name=Jeffers2018/> and has a relatively large ], traversing the ] at a rate of {{Val\|1.815\|ul=arcsecond}}·yr<sup>−1</sup>.<ref name=Lepine2005/>		'''GJ 1151''' is a ] located in the northern ] of ] at a distance of {{convert\|26.2\|ly\|pc\|lk=on\|abbr=off}} from the ]. It has a reddish hue and is too faint to be visible to the naked eye with an ] of 14.0<ref name=Houdebine2019/> The star is moving closer with a ] of −36 km/s,<ref name=Jeffers2018/> and has a relatively large ], traversing the ] at a rate of {{Val\|1.815\|ul=arcsecond}}·yr<sup>−1</sup>.<ref name=Lepine2005/>

	This is a small ] star of ] dM4.5.<ref name=Houdebine2019/> It is 2.5<ref name=Mann2015/> billion years old and is spinning with a ] of 2.0 km/s.<ref name=Jeffers2018/> The star has 15.4%<ref name=Mann2015/> of the ] and 19.0%<ref name=Mann2015/> of the ], with an ] of 3,143 K.<ref name=Houdebine2019/>		This is a small ] star of ] dM4.5.<ref name=Houdebine2019/> It is 2.5<ref name=Mann2015/> billion years old and is spinning with a ] of 2.0 km/s.<ref name=Jeffers2018/> The star has 15.4%<ref name=Mann2015/> of the ] and 19.0%<ref name=Mann2015/> of the ], with an ] of 3,143 K.<ref name=Houdebine2019/>
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	Two papers published only a month apart in 2021 discussed planet detection at GJ 1151 by the ]. One claimed the detection of a planet with a ] of {{Earth mass\|2.5\|link=y}} and a period of 2 days, supporting the radio emission detection,<ref name=Mahadevan2021/> while the other was unable to confirm this candidate planet, finding that the 2-day signal is likely caused by long-term variability, possibly connected to a more distant planet.<ref name=Perger2021/> This second study placed an upper limit of {{Earth mass\|0.7-1.2}} on the minimum masses of any undetected planets with periods from 1-5 days.<ref name=Perger2021/>		Two papers published only a month apart in 2021 discussed planet detection at GJ 1151 by the ]. One claimed the detection of a planet with a ] of {{Earth mass\|2.5\|link=y}} and a period of 2 days, supporting the radio emission detection,<ref name=Mahadevan2021/> while the other was unable to confirm this candidate planet, finding that the 2-day signal is likely caused by long-term variability, possibly connected to a more distant planet.<ref name=Perger2021/> This second study placed an upper limit of {{Earth mass\|0.7-1.2}} on the minimum masses of any undetected planets with periods from 1-5 days.<ref name=Perger2021/>

	In 2023, a different planet was found, with a minimum mass of {{Earth mass\|10.6}} and a 390-day orbit, along with additional radial velocity variations. This new planet is referred to by the discovery paper as GJ 1151 b, but it is ~~possible~~ ~~that~~ ~~other~~ ~~sources~~ ~~will~~ refer to it as GJ 1151 c to differentiate it from the previous candidate. While the presence of a short-period planet associated with the radio emissions could not be completely ruled out, if such a planet exists its minimum mass must be less than {{Earth mass\|1.2}}.<ref name="Blanco-Pozo2023"/>		In 2023, a different planet was found, with a minimum mass of {{Earth mass\|10.6}} and a 390-day orbit, along with additional radial velocity variations. This new planet was referred to by the ] version of the discovery paper as GJ 1151 b, but the published version of the paper, as well as the ], refer to it as GJ 1151 c to differentiate it from the previous candidate. While the presence of a short-period planet associated with the radio emissions could not be completely ruled out, if such a planet exists its minimum mass must be less than {{Earth mass\|1.2}}.<ref name="Blanco-Pozo2023"/>

	{{OrbitboxPlanet begin		{{OrbitboxPlanet begin
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	{{OrbitboxPlanet		{{OrbitboxPlanet
	\| exoplanet = b		\| exoplanet = c
	\| mass_earth = {{val\|10.62\|1.31\|1.47\|p=≥}}		\| mass_earth = {{val\|10.62\|1.31\|1.47\|p=≥}}
	\| radius_earth =		\| radius_earth =
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	<ref name=Perger2021>{{citation\|arxiv=2103.10216\|year=2021\|title=The CARMENES search for exoplanets around M dwarfs\|doi=10.1051/0004-6361/202140786\|last1=Perger\|first1=M.\|last2=Ribas\|first2=I.\|last3=Anglada-Escudé\|first3=G.\|last4=Morales\|first4=J. C.\|last5=Amado\|first5=P. J.\|last6=Caballero\|first6=J. A.\|last7=Quirrenbach\|first7=A.\|last8=Reiners\|first8=A.\|last9=Béjar\|first9=V. J. S.\|last10=Dreizler\|first10=S.\|last11=Galadí-Enríquez\|first11=D.\|last12=Hatzes\|first12=A. P.\|last13=Henning\|first13=Th.\|last14=Jeffers\|first14=S. V.\|last15=Kaminski\|first15=A.\|last16=Kürster\|first16=M.\|last17=Lafarga\|first17=M.\|last18=Montes\|first18=D.\|last19=Pallé\|first19=E.\|last20=Rodríguez-López\|first20=C.\|last21=Schweitzer\|first21=A.\|last22=Zapatero Osorio\|first22=M. R.\|last23=Zechmeister\|first23=M.\|journal=Astronomy & Astrophysics\|volume=649\|pages=L12\|s2cid=126038821 \|bibcode=2021A&A...649L..12P}}</ref>		<ref name=Perger2021>{{citation\|arxiv=2103.10216\|year=2021\|title=The CARMENES search for exoplanets around M dwarfs\|doi=10.1051/0004-6361/202140786\|last1=Perger\|first1=M.\|last2=Ribas\|first2=I.\|last3=Anglada-Escudé\|first3=G.\|last4=Morales\|first4=J. C.\|last5=Amado\|first5=P. J.\|last6=Caballero\|first6=J. A.\|last7=Quirrenbach\|first7=A.\|last8=Reiners\|first8=A.\|last9=Béjar\|first9=V. J. S.\|last10=Dreizler\|first10=S.\|last11=Galadí-Enríquez\|first11=D.\|last12=Hatzes\|first12=A. P.\|last13=Henning\|first13=Th.\|last14=Jeffers\|first14=S. V.\|last15=Kaminski\|first15=A.\|last16=Kürster\|first16=M.\|last17=Lafarga\|first17=M.\|last18=Montes\|first18=D.\|last19=Pallé\|first19=E.\|last20=Rodríguez-López\|first20=C.\|last21=Schweitzer\|first21=A.\|last22=Zapatero Osorio\|first22=M. R.\|last23=Zechmeister\|first23=M.\|journal=Astronomy & Astrophysics\|volume=649\|pages=L12\|s2cid=126038821 \|bibcode=2021A&A...649L..12P}}</ref>

	<ref name="Blanco-Pozo2023">{{cite journal \|last1=Blanco-Pozo \|first1=J. \|last2=Perger \|first2=M. \|display-authors=etal \|date=~~January~~ 2023 \|title=The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data \|journal=] \|volume= \|issue= \|pages= \|doi= 10.1051/0004-6361/202245053\|arxiv=2301.04442}}</ref>		<ref name="Blanco-Pozo2023">{{cite journal \|last1=Blanco-Pozo \|first1=J. \|last2=Perger \|first2=M. \|display-authors=etal \|date=March 2023 \|title=The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data \|journal=] \|volume=671 \|issue= \|pages=A50 \|doi=10.1051/0004-6361/202245053 \|arxiv=2301.04442 \|bibcode=2023A&A...671A..50B}}</ref>

	}}		}}
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Revision as of 02:32, 8 May 2023

Red dwarf star

GJ 1151
Observation data Epoch J2000.0 Equinox J2000.0
Artist's impression of GJ 1151 and an orbiting planet
Constellation	Ursa Major
Right ascension	11 50 57.72053
Declination	+48° 22′ 38.5612″
Apparent magnitude (V)	14.008
Characteristics
Spectral type	dM4.5
B−V color index	1.787
Astrometry

Radial velocity (R_v)	−36.13±0.26 km/s
Proper motion (μ)	RA: -1545.069 mas/yr Dec.: -962.724 mas/yr
Parallax (π)	124.3378 ± 0.0549 mas
Distance	26.23 ± 0.01 ly (8.043 ± 0.004 pc)
Absolute magnitude (M_V)	14.482±0.022

Details

Mass	0.1639±0.0093 `M`_☉
Radius	0.1781±0.0042 `R`_☉
Luminosity (bolometric)	0.003315±0.000018 `L`_☉
Surface gravity (log g)	5.09±0.09 cgs
Temperature	3,143±26 K
Metallicity	−0.12±0.10 dex
Rotation	140±10 d
Rotational velocity (v sin i)	2.0 km/s
Age	2.5 Gyr

Other designations
GJ 1151, G 122-49, LHS 316, NLTT 28752, 2MASS J11505787+4822395, Gaia EDR3 786834302080370304
Database references
SIMBAD	data

GJ 1151 is a star located in the northern circumpolar constellation of Ursa Major at a distance of 26.2 light-years (8.0 parsecs) from the Sun. It has a reddish hue and is too faint to be visible to the naked eye with an apparent visual magnitude of 14.0 The star is moving closer with a radial velocity of −36 km/s, and has a relatively large proper motion, traversing the celestial sphere at a rate of 1.815″·yr.

This is a small red dwarf star of spectral type dM4.5. It is 2.5 billion years old and is spinning with a projected rotational velocity of 2.0 km/s. The star has 15.4% of the mass of the Sun and 19.0% of the Sun's radius, with an effective temperature of 3,143 K.

Planetary system

In 2020, astronomers announced the discovery of radio emissions from the star which are consistent with the star having a magnetic interaction with a planet approximately the size of Earth, revolving in a 1-5 day long orbit. Such an interaction would be analogous to a scaled-up version of the Jupiter-Io magnetic interaction, with GJ 1151 taking the role of Jupiter and its planet the role of Io.

Two papers published only a month apart in 2021 discussed planet detection at GJ 1151 by the radial velocity method. One claimed the detection of a planet with a minimum mass of 2.5 M_E and a period of 2 days, supporting the radio emission detection, while the other was unable to confirm this candidate planet, finding that the 2-day signal is likely caused by long-term variability, possibly connected to a more distant planet. This second study placed an upper limit of 0.7-1.2 M_E on the minimum masses of any undetected planets with periods from 1-5 days.

In 2023, a different planet was found, with a minimum mass of 10.6 M_E and a 390-day orbit, along with additional radial velocity variations. This new planet was referred to by the preprint version of the discovery paper as GJ 1151 b, but the published version of the paper, as well as the NASA Exoplanet Archive, refer to it as GJ 1151 c to differentiate it from the previous candidate. While the presence of a short-period planet associated with the radio emissions could not be completely ruled out, if such a planet exists its minimum mass must be less than 1.2 M_E.

The GJ 1151 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
c	≥10.62+1.31 −1.47 M_🜨	0.5714+0.0053 −0.0064	389.7+5.4 −6.5	—	—	—

References

^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ Houdebine, Éric R.; et al. (August 2019). "The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs". The Astronomical Journal. 158 (2): 17. arXiv:1905.07921. Bibcode:2019AJ....158...56H. doi:10.3847/1538-3881/ab23fe. S2CID 159041104. 56.{{cite journal}}: CS1 maint: unflagged free DOI (link)
^ Mann, Andrew W.; et al. (May 2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal. 804 (1): 38. arXiv:1501.01635. Bibcode:2015ApJ...804...64M. doi:10.1088/0004-637X/804/1/64. S2CID 19269312. 64.
^ Blanco-Pozo, J.; Perger, M.; et al. (March 2023). "The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data". Astronomy & Astrophysics. 671: A50. arXiv:2301.04442. Bibcode:2023A&A...671A..50B. doi:10.1051/0004-6361/202245053.
^ Jeffers, S. V.; et al. (June 2018). "CARMENES input catalogue of M dwarfs. III. Rotation and activity from high-resolution spectroscopic observations". Astronomy & Astrophysics. 614: 19. arXiv:1802.02102. Bibcode:2018A&A...614A..76J. doi:10.1051/0004-6361/201629599. S2CID 56147445. A76.
"G 122-49". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-02.
Lépine, Sébastien; Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. arXiv:astro-ph/0412070. Bibcode:2005AJ....129.1483L. doi:10.1086/427854. S2CID 2603568.
Vedantham, H. K.; et al. (2020-02-17). "Coherent radio emission from a quiescent red dwarf indicative of star–planet interaction". Nature Astronomy. 4 (6): 577–583. arXiv:2002.08727. Bibcode:2020NatAs...4..577V. doi:10.1038/s41550-020-1011-9. hdl:1887/3133600. ISSN 2397-3366. S2CID 211204712.
Pope, Benjamin J. S.; et al. (17 February 2020). "No Massive Companion to the Coherent Radio-emitting M Dwarf GJ 1151". The Astrophysical Journal Letters. 890 (2): L19. arXiv:2002.07850. Bibcode:2020ApJ...890L..19P. doi:10.3847/2041-8213/ab5b99. S2CID 211171765. Retrieved 1 March 2020.{{cite journal}}: CS1 maint: unflagged free DOI (link)
Starr, Michelle (29 February 2020). "For The First Time, Astronomers Have Detected an Exoplanet Using Radio Waves". ScienceAlert.com. Retrieved 1 March 2020.
"Radio telescope measures aurorae in distant planetary system". UPI. Retrieved 2020-02-26.
Redd, Nola Taylor (18 February 2020). "New Exoplanet Search Strategy Claims First Discovery". Quanta Magazine. Retrieved 2020-02-26.
Clark, Stuart. "An exoplanet is generating radio waves from its red dwarf sun". New Scientist. Retrieved 2020-02-26.
Mahadevan, Suvrath; Stefánsson, Gudmundur; Robertson, Paul; Terrien, Ryan C.; Ninan, Joe P.; Holcomb, Rae J.; Halverson, Samuel; Cochran, William D.; Kanodia, Shubham; Ramsey, Lawrence W.; Wolszczan, Alexander; Endl, Michael; Bender, Chad F.; Diddams, Scott A.; Fredrick, Connor; Hearty, Fred; Monson, Andrew; Metcalf, Andrew J.; Roy, Arpita; Schwab, Christian (2021), "The Habitable-zone Planet Finder Detects a Terrestrial-mass Planet Candidate Closely Orbiting Gliese 1151: The Likely Source of Coherent Low-frequency Radio Emission from an Inactive Star", The Astrophysical Journal Letters, 919 (1): L9, arXiv:2102.02233, Bibcode:2021ApJ...919L...9M, doi:10.3847/2041-8213/abe2b2, S2CID 231802021{{citation}}: CS1 maint: unflagged free DOI (link)
^ Perger, M.; Ribas, I.; Anglada-Escudé, G.; Morales, J. C.; Amado, P. J.; Caballero, J. A.; Quirrenbach, A.; Reiners, A.; Béjar, V. J. S.; Dreizler, S.; Galadí-Enríquez, D.; Hatzes, A. P.; Henning, Th.; Jeffers, S. V.; Kaminski, A.; Kürster, M.; Lafarga, M.; Montes, D.; Pallé, E.; Rodríguez-López, C.; Schweitzer, A.; Zapatero Osorio, M. R.; Zechmeister, M. (2021), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics, 649: L12, arXiv:2103.10216, Bibcode:2021A&A...649L..12P, doi:10.1051/0004-6361/202140786, S2CID 126038821

Known celestial objects within 20 light-years

Primary member type

Celestial objects by systems. Secondary members are listed in small print.

0–10 ly →

Main-sequence
stars

A-type	Sirius (Alpha Canis Majoris) (8.7094±0.0054 ly) white dwarf B
G-type	Sun (0 ly) rest of Solar System Alpha Centauri α Cen (Rigil Kentaurus) (4.3441±0.0022 ly) K-type main-sequence star B (Toliman) red dwarf C (Proxima Centauri) (4.2465 ± 0.0003 ly) 2 (5?) planets: Ab?; Bc?; Cb, Cc?, Cd
M-type (red dwarfs)	Barnard's Star (5.9629±0.0004 ly) 1 (4?) planets: b, c?, d?, e? Wolf 359 (7.8558±0.0013 ly) 1? planets: b? Lalande 21185 (8.3044±0.0007 ly) 2 (3?) planets: b, d?, c Gliese 65 A (BL Ceti) (8.724±0.012 ly) red dwarf B (UV Ceti) 1? planets: b? Ross 154 (9.7063±0.0009 ly)

Brown dwarfs

L-type	Luhman 16 (6.5029±0.0011 ly) T-type brown dwarf B

Sub-brown dwarfs
and rogue planets

Y-type	WISE 0855−0714 (7.430±0.041 ly)

← 10–15 ly →

Subgiant stars

F-type	Procyon (Alpha Canis Minoris) (11.402±0.032 ly) white dwarf B

Main-sequence
stars

G-type	Tau Ceti (11.9118±0.0074 ly) 4 (8?) planets: (b), (c), (d), e, f, g, h, (i)
K-type	Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0.0041 ly) 2 T-type brown dwarfs: Ba, Bb planet Ab
M-type (red dwarfs)	Ross 248 (10.3057±0.0014 ly) Lacaille 9352 (10.7241±0.0007 ly) 2 (3?) planets: b, c, d? Ross 128 (11.0074±0.0011 ly) planet b EZ Aquarii (11.109±0.034 ly) 2 red dwarfs: B, C Struve 2398 (11.4908±0.0009 ly) red dwarf B 1 (3?) planets: Ab, Bb?, Bc? Groombridge 34 (11.6191±0.0008 ly) red dwarf B 2 planets: Ab, Ac DX Cancri (11.6797±0.0027 ly) GJ 1061 (11.9839±0.0014 ly) 3 planets: b, c, d YZ Ceti (12.1222±0.0015 ly) 3 planets: b, c, d Luyten's Star (12.3485±0.0019 ly) 2 (4?) planets: b, c, d?, e? Teegarden's Star (12.4970±0.0045 ly) 3 planets: b, c, d Kapteyn's Star (12.8308±0.0008 ly) Lacaille 8760 (12.9472±0.0018 ly) SCR 1845−6357 (13.0638±0.0070 ly) T-type brown dwarf B Kruger 60 (13.0724±0.0052 ly) red dwarf B DENIS J1048−3956 (13.1932±0.0027 ly) Ross 614 (13.363±0.040 ly) red dwarf B Wolf 1061 (14.0500±0.0016 ly) 3 planets: b, c, d Gliese 1 (14.1747±0.0022 ly) TZ Arietis (14.5780±0.0046 ly) planet b Wolf 424 (14.595±0.031 ly) red dwarf B Gliese 687 (14.8395±0.0014 ly) 2 planets: b, c Gliese 674 (14.8492±0.0018 ly) planet b LHS 292 (14.8706±0.0041 ly)

Degenerate
stars

White dwarfs	van Maanen 2 (14.0718±0.0011 ly)

Brown dwarfs

T-type	UGPS J0722-0540 (13.43±0.13 ly)

← 15–20 ly

Subgiant stars

G-type	Delta Pavonis (19.893±0.015 ly)

Main-sequence
stars

A-type	Altair (Alpha Aquilae) (16.730±0.049 ly)
G-type	Alsafi (Sigma Draconis) (18.7993±0.0081 ly) Achird (Eta Cassiopeiae) (19.3314±0.0025 ly) K-type main-sequence star B e (82 G.) Eridani (19.7045±0.0093 ly) 3 planets: b, c, d
K-type	Groombridge 1618 (15.8857±0.0017 ly) Omicron (40) Eridani (16.3330±0.0042 ly) white dwarf B red dwarf C 70 Ophiuchi (16.7074±0.0087 ly) K-type main-sequence star B Gliese 570 (19.1987±0.0074 ly) 2 red dwarfs: B, C T-type brown dwarf D 36 Ophiuchi (19.4185±0.0036 ly) 2 K-type main-sequence stars: B, C HR 7703 (19.609±0.013 ly) red dwarf B
M-type (red dwarfs)	GJ 1245 (15.2001±0.0034 ly) 2 red dwarfs: B, C Gliese 876 (15.2382±0.0025 ly) 4 planets: d, c, b, e LHS 288 (15.7586±0.0034 ly) GJ 1002 (15.8060±0.0036 ly) 2 planets: b, c Gliese 412 (15.9969±0.0026 ly) red dwarf B AD Leonis (16.1939±0.0024 ly) Gliese 832 (16.2005±0.0019 ly) planet b Gliese 682 (16.3328±0.0026 ly) 2? planets: b?, c? EV Lacertae (16.4761±0.0018 ly) G 9-38 (16.800±0.011 ly) red dwarf B GJ 3379 (16.9861±0.0027 ly) Gliese 445 (17.1368±0.0017 ly) 2M1540 (17.3738±0.0046 ly) GJ 3323 (17.5309±0.0026 ly) 2 planets: b, c Gliese 526 (17.7263±0.0024 ly) Stein 2051 (17.9925±0.0020 ly) white dwarf B Gliese 251 (18.2146±0.0028 ly) planet b LP 816-60 (18.3305±0.0038 ly) LSR J1835+3259 (18.5534±0.0049 ly) Gliese 205 (18.6042±0.0022 ly) Gliese 229 (18.7906±0.0018 ly) 2 T-type brown dwarfs: Ba, Bb 2 planets: Ab, Ac Ross 47 (18.8883±0.0031 ly) Gliese 693 (19.2078±0.0053 ly) Gliese 754 (19.2724±0.0067 ly) Gliese 908 (19.2745±0.0032 ly) Gliese 752 (19.2922±0.0027 ly) red dwarf B (vB 10) planet Ab Gliese 588 (19.2996±0.0031 ly) YZ Canis Minoris (19.5330±0.0040 ly) GJ 1005 (19.577±0.035 ly) red dwarf B Gliese 268 (19.7414±0.0076 ly) red dwarf B

Degenerate
stars

White dwarfs	Gliese 440 (15.1226±0.0013 ly)

Brown dwarfs

L-type	DENIS 0255−4700 (15.877±0.014 ly)
T-type	WISE 1741+2553 (15.22±0.20 ly) WISE 1506+7027 (16.856±0.052 ly) DENIS 0817-6155 (17.002±0.037 ly) 2MASS 0939-2448 (17.41±0.44 ly) T-type brown dwarf B 2MASS 1114-2618 (18.20±0.14 ly) 2MASS 0415-0935 (18.62±0.18 ly) SIMP0136 (19.955±0.057 ly) 2MASS 0937+2931 (19.96 _−0.21 ly)
Y-type	WISE 1639−6847 (15.450±0.041 ly) WISE 0350−5658 (18.49±0.24 ly)

Sub-brown dwarfs
and rogue planets

Y-type	WISE 1541−2250 (19.54±0.24 ly)

Italic are systems without known trigonometric parallax.

Constellation of Ursa Major

Stars

Bayer	α (Dubhe) β (Merak) γ (Phecda) δ (Megrez) ε (Alioth) ζ (Mizar) η (Alkaid) θ ι (Talitha) κ (Alkaphrah) λ (Tania Borealis) μ (Tania Australis) ν (Alula Borealis) ξ (Alula Australis) ο (Muscida) π π ρ σ σ τ υ φ χ (Taiyangshou) ψ ω
Flamsteed	2 (A) 5 (b) 6 15 (f) 16 (c) 17 18 (e) 19 20 21 22 23 (h) 24 (d) 26 27 28 31 32 35 36 37 38 39 40 41 42 43 44 46 47 (Chalawan) 49 51 55 56 57 58 59 60 61 62 65 66 67 68 70 71 72 73 74 75 76 78 80 (Alcor) 81 82 83 84 86 55 Cam 56 Cam 57 Cam 1 CVn 14 LMi 15 LMi 25 LMi 47 LMi 37 Lyn 39 Lyn 41 Lyn (Intercrus)
Variable	R T U W Z RV ST SU SW SX TU TX TY UX UY VV VX VY XY ZZ AA AB AE AN AR AW BC BE BM BZ CG CH CO CQ CY DH DI DM DV DW EE EG EI EK EN EP ER ET EU EV EZ IY KS
HR	3922 4067 4098 4132 4867 5148
HD	68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731
Other	ADS 7251 Feige 55 G 196-3 Gliese 338 Gliese 412 Gliese 414 GJ 3512 Groombridge 1618 Groombridge 1830 HAT-P-3 (Dombay) HAT-P-13 HAT-P-21 (Mazaalai) HIP 57050 HIP 57274 1SWASP J093010.78+533859.5 KELT-24 Lalande 21185 M82 X-1 M82 X-2 Qatar-8 Sidus Ludoviciana SN H0pe UGC 5497 US 708 Winnecke 4 WISE 1405+5534 XTE J1118+480

Exoplanets	47 Ursae Majoris b (Taphao Thong) c (Taphao Kaew) d ο Ursae Majoris b 41 Lyncis b (Arkas) Gliese 414 Ab c HAT-P-3b (Teberda) HD 80606 b HD 89744 b KELT-24b

Nebulae	Owl Nebula

Galaxies

Messier	81 (Bode's Galaxy) 82 (Cigar Galaxy) 101 (Pinwheel Galaxy) 108 109
NGC	2603 2606 2681 2685 2688 2768 2787 2800 2805 2814 2841 2857 2950 2959 2976 2985 2998 3005 3006 3008 3009 3073 3077 3079 3184 3191 3198 3206 3259 3310 3319 3353 3359 3435 3445 3448 3516 3539 3545B 3550 3552 3553 3554 3358 3561 3583 3610 3613 3619 3631 3642 3656 3665 3669 3675 3690 3718 3726 3729 3738 3741 3786 3794 3877 3893 3898 3921 3928 3938 3941 3945 3949 3953 3972 3982 3985 3994 3995 3998 4013 4026 4036 4041 4051 4088 4096 4100 4102 4144 4157 4194 4500 4605 5001 5164 5201 5204 5256 5278 5279 5308 5322 5422 5473 5474 5477 5486 5502 5585
Other	2MASX J10222849+5006200 3C 219 3C 244.1 3C 268.3 CEERS-2112 Haro 2 Holmberg IX I Zwicky 18 IC 923 IC 2574 IRAS F11119+3257 Markarian 231 Markarian 273 Markarian 421 Mayall's Object SBS 0953+549 SDSS J1148+5251 UGC 4879 UGC 5101 UGC 6945 UGC 8335 UGC 8508 Ursa Major III

Astronomical events	SN 1999by

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