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HD 174387

Location of HD 174837 and HD 174500 (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Telescopium
Right ascension	18 52 27.2298
Declination	−46° 35′ 42.4326″
Apparent magnitude (V)	5.49±0.01
Characteristics
Spectral type	M0 III
B−V color index	+1.63
Variable type	suspected
Astrometry
Radial velocity (Rv)	−28.1±0.9 km/s
Proper motion (μ)	RA: +28.229 mas/yr Dec.: −0.941 mas/yr
Parallax (π)	4.0175 ± 0.1091 mas
Distance	810 ± 20 ly (249 ± 7 pc)
Absolute magnitude (MV)	−1.97
Details
Mass	1.14 M☉
Radius	82.63 R☉
Luminosity	902 L☉
Surface gravity (log g)	0.79 cgs
Temperature	3929±122 K
Metallicity	−0.04 dex
Other designations
33 G. Telescopii, NSV 24617, CD−46°12669, CPD−46°9512, GC 25861, HD 174387, HIP 92630, HR 7092, SAO 229336
Database references
SIMBAD	data

HD 174387 (HR 7092) is a solitary star in the southern constellation Telescopium. With an apparent magnitude of 5.49, it is faintly visible to the naked eye if viewed under dark skies. Parallax measurements put the object at a distance of 810 light years and it is currently approaching the Solar System with a heliocentric radial velocity of −28.1 km/s.

HD 174387 has a stellar classification of M0 III, indicating that it is an ageing red giant. Due to its evolved state, the star has expanded to a diameter of 82.63 R_☉. At present it has 114% the mass of the Sun and shines 902 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,929 K, giving a red hue when viewed. HD 174387's metallicity is estimated to be 91% that of the Sun. The star is suspected to be variable, ranging from magnitudes 5.59 to 5.63 in the Hipparcos passband.

References

1. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
3. ^ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor: Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
4. Corben, P. M. (April 1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 30 (4): 37. Bibcode:1971MNSSA..30...37C. ISSN 0024-8266.
5. ^ Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. ISSN 1063-7729. S2CID 125853869.
6. ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication: 0. Bibcode:1953GCRV..C......0W.
7. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
8. ^ Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
9. ^ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
10. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
11. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
12. "HR 7092". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 24, 2022.
13. Gould, Benjamin Apthorp (1878). "Uranometria Argentina: brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral: con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
14. Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.

v t e Constellation of Telescopium
List of stars in Telescopium Telescopium in Chinese astronomy
Stars	Bayer α δ δ ε ζ η ι κ λ μ ν ξ ρ τ Variable RR RS RX BL HO PV PW PZ QQ QS QU QV HR 6778 6821 6894 6954 6986 7065 7092 7093 7095 7097 7190 7223 7233 7271 7289 7297 7370 7388 7411 7459 7521 7537 7548 7549 7621 7674 7714 7745 7749 7758 7766 HD 168871 173047 177365 181295 191760 Other KELT-10 Gliese 754 Gliese 784 GJ 1252
Exoplanets Gliese 754 b Gliese 784 b GJ 1252 b KELT-10b
Star clusters NGC 6584
Galaxies	NGC 6845 6861 Other PKS 2014-55
Category

• Telescopium
• M-type giants
• Suspected variables
• Gould objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects