AK Pictoris - Misplaced Pages

Star system in the constellation Pictor

AK Pictoris
Observation data Epoch J2000 Equinox J2000
A light curve for AK Pictoris, plotted from TESS data.
Constellation	Pictor
Right ascension	06 38 00.36576
Declination	−61° 32′ 00.1941″
Apparent magnitude (V)	6.182 (6.32 / 8.77)
Characteristics
Spectral type	G2 + K5:
B−V color index	+0.62
Variable type	BY Dra
Astrometry

Radial velocity (R_v)	32.10 ± 0.5 km/s
Proper motion (μ)	RA: -47.84 mas/yr Dec.: 72.73 mas/yr
Parallax (π)	46.96 ± 0.81 mas
Distance	69 ± 1 ly (21.3 ± 0.4 pc)
Absolute magnitude (M_V)	4.63 + ?

Orbit
Period (P)	217.6 yr
Semi-major axis (a)	2.004″
Eccentricity (e)	0.336
Inclination (i)	93.9°
Longitude of the node (Ω)	91.6°
Periastron epoch (T)	2033.9
Argument of periastron (ω) (secondary)	357.3°
Details
AK Pic A
Mass	1.03 `M`_☉
Radius	1.22 `R`_☉
Luminosity	1.45 `L`_☉
Temperature	5860 K
Rotational velocity (v sin i)	15.1 ± 0.8 km/s
AK Pic B
Luminosity	0.25 `L`_☉
Temperature	4400 K
Rotational velocity (v sin i)	15.5 ± 2.0 km/s
Other designations
CD−61° 1428, GJ 3400, HD 48189, HIP 31711, HR 2468, SAO 249604
Database references
SIMBAD	data

AK Pictoris is a star system in the constellation Pictor. Its combined apparent magnitude is 6.182. Based on the system's parallax, it is located 69 light-years (21.3 parsecs) away. AK Pictoris is a member of the AB Doradus moving group, a group of stars with similar motions that are thought to be associated.

AK Pictoris is a binary star. Its two stars orbit each other every 217.6 years, separated by 2.004″. The primary star is a G-type star with similar properties to the Sun. The secondary star is a K-type star. The primary star is a young BY Draconis variable, a class of variable stars that derive their variability from stellar rotation. It is also known to host a debris disk, inferred from its infrared excess.

References

"MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 7 September 2024.
^ van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Archived from the original on 2019-12-07. Retrieved 2017-07-20.
^ "V* AK Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 July 2017.
^ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 20 July 2017.
^ McCarthy, Kyle; White, Russel J. (2012). "The Sizes of the Nearest Young Stars". The Astronomical Journal. 143 (6): 134. arXiv:1201.6600. Bibcode:2012AJ....143..134M. doi:10.1088/0004-6256/143/6/134. S2CID 118538522.
Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
^ Samus', N. N.; Goranskii, V. P.; Durlevich, O. V.; Zharova, A. V.; Kazarovets, E. V.; Kireeva, N. N.; Pastukhova, E. N.; Williams, D. B.; Hazen, M. L. (2003). "An Electronic Version of the Second Volume of the General Catalogue of Variable Stars with Improved Coordinates". Astronomy Letters. 29 (7): 468. Bibcode:2003AstL...29..468S. doi:10.1134/1.1589864. S2CID 16299532.
Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
^ Fuhrmann, K.; Chini, R. (2015). "Multiplicity Among F-Type Stars. II". The Astrophysical Journal. 809 (1): 107. Bibcode:2015ApJ...809..107F. doi:10.1088/0004-637X/809/1/107. S2CID 126218052.
^ Plavchan, Peter; Werner, M. W.; Chen, C. H.; Stapelfeldt, K. R.; Su, K. Y. L.; Stauffer, J. R.; Song, I. (2009). "New Debris Disks Around Young, Low-Mass Stars Discovered with Thespitzer Space Telescope". The Astrophysical Journal. 698 (2): 1068–1094. arXiv:0904.0819. Bibcode:2009ApJ...698.1068P. doi:10.1088/0004-637X/698/2/1068. S2CID 51417657.

Constellation of Pictor

Stars

Bayer	α β γ δ ζ η η θ ι κ λ μ ν μ Dor
Variable	R S RR SW TU TV TW TX AB AE AK VZ
HR	1498 1667 1727 1742 1813 1856 1860 1912 1984 2008 2023 2032 2044 2049 2072 2089 2094 2114 2117 2138 2274 2336 2337 2345 2354 2360 2369 2389 2562
HD	37781 40307 41004 41248
Other	2MASS J05581644–4501559 EBLM J0555-57 NGC 1995 PSR J0437−4715 TOI-270 TOI-1338 WISE 0647−6232

Exoplanets	AB Pictoris b β Pictoris b c HD 40307 b c d e f g HR 2562 B LHS 1815 b TOI-1338 b c

Galaxies

NGC	1705 1803 1998 2008
Other	Pictor A PKS 0529-549 PKS 0537-441 QSO J0529-4351