55 Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 01h 53m 17.34433s[2] |
| Declination | +40° 43′ 47.2455″[2] |
| Apparent magnitude (V) | 5.42[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K1 III[3] |
| U−B color index | +1.41[4] |
| B−V color index | +1.32[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.59±0.2[5] km/s |
| Proper motion (μ) | RA: −10.028[2] mas/yr Dec.: −3.966[2] mas/yr |
| Parallax (π) | 4.4983±0.0761 mas[2] |
| Distance | 730 ± 10 ly (222 ± 4 pc) |
| Absolute magnitude (MV) | −1.00[1] |
| Details | |
| Mass | 5.0[2] M☉ |
| Radius | 37[6] R☉ |
| Luminosity | 492[6] L☉ |
| Surface gravity (log g) | 1.58[7] cgs |
| Temperature | 4,348[7] K |
| Metallicity [Fe/H] | −0.14[3] dex |
| Age | 323[7] Myr |
| Other designations | |
| 55 And, BD+40°394, FK5 2124, HD 11428, HIP 8814, HR 543, SAO 37587, PPM 44535, WDS J01533+4044A[8] | |
| Database references | |
| SIMBAD | data |
55 Andromedae, abbreviated 55 And, is a single,[9] orange-hued star in the northern constellation of Andromeda. 55 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.42.[1] Based upon an annual parallax shift of 4.5 mas,[2] it is located about 730 light years from the Sun. 55 And is moving closer to the Earth with a heliocentric radial velocity of −7.6 km/s.[5] It is a member of the Sirius supercluster.[10]
This is an aging giant star with a stellar classification of K1 III,[3] which indicates it has exhausted the hydrogen supply at its core and evolved away from the main sequence. It is radiating 492 times the Sun's luminosity[6] from its enlarged photosphere at an effective temperature of 4,348 K.[7] It has a magnitude 10.90 visual companion at an angular separation of 59.00″ along a position angle of 357° from 55 And. In 1828, this separation was just 20.0″.[11]
References
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e f g h 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.
- ^ a b c McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
- ^ a b Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475–493, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
- ^ a b Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304.
- ^ a b c Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel; Jenkins, Jon M.; Stassun, Keivan; Twicken, Joseph D.; Vanderspek, Roland; Winn, Joshua N. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series. 268 (1): 4. arXiv:2208.11721. Bibcode:2023ApJS..268....4F. doi:10.3847/1538-4365/acdee5.
- ^ a b c d Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A.; Andrae, R.; Poggio, E.; Spitoni, E.; Contursi, G.; Zhao, H.; Oreshina-Slezak, I.; Ordenovic, C.; Bijaoui, A. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics. 669: A104. arXiv:2206.07937. Bibcode:2023A&A...669A.104K. doi:10.1051/0004-6361/202244283.
- ^ "55 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 1, 2018.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Eggen, Olin J. (October 1996), "Star Streams and Galactic Structure", Astronomical Journal, 112: 1595, Bibcode:1996AJ....112.1595E, doi:10.1086/118126.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.