28 Andromedae

28 Andromedae

The blue band light curve, normalized to zero mean, of 28 Andromedae, adapted from Garrido et al.[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 30m 07.36s[2]
Declination +29° 45′ 05.6″[2]
Apparent magnitude (V) 5.214[3]
Characteristics
Spectral type A7 III[4]
U−B color index +0.08[5]
B−V color index +0.26[5]
Variable type δ Sct[6]
Astrometry
Radial velocity (Rv)−10.3 ± 0.6[7] km/s
Proper motion (μ) RA: 44.983±0.344[8] mas/yr
Dec.: 55.668±0.176[8] mas/yr
Parallax (π)16.3540 ± 0.1743 mas[8]
Distance199 ± 2 ly
(61.1 ± 0.7 pc)
Absolute magnitude (MV)1.29[9]
Details
Mass1.77[10] M☉
Radius3.19[8] R☉
Luminosity25.007[8] L☉
Surface gravity (log g)3.95±0.06[11] cgs
Temperature7,335±69[11] K
Metallicity [Fe/H]−0.09±0.05[11] dex
Rotational velocity (v sin i)21±2[12] km/s
Age1.159[10] Gyr
Other designations
BD+28°75, HD 2628, HIP 2355, HR 114, SAO 74041, PPM 89834
Database references
SIMBADdata

28 Andromedae (abbreviated 28 And) is a Delta Scuti variable star in the constellation Andromeda. 28 Andromedae is the Flamsteed designation. It also bears the variable star name GN Andromedae. Its apparent magnitude is 5.214, varying by less than 0.1 magnitudes.

  1. ^ Cite error: The named reference garrido was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  3. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  4. ^ Cowley, A.; Fraquelli, D. (1974). "MK Spectral Types for Some Bright F Stars". Publications of the Astronomical Society of the Pacific. 86 (509): 70. Bibcode:1974PASP...86...70C. doi:10.1086/129562.
  5. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  6. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  7. ^ 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.
  8. ^ a b c d e Cite error: The named reference dr2 was invoked but never defined (see the help page).
  9. ^ Huang, W.; et al. (2012). "A catalogue of Paschen-line profiles in standard stars". Astronomy & Astrophysics. 547: A62. arXiv:1210.7893. Bibcode:2012A&A...547A..62H. doi:10.1051/0004-6361/201219804. S2CID 119286159.
  10. ^ a b Cite error: The named reference David2015 was invoked but never defined (see the help page).
  11. ^ a b c Prugniel, Ph. (1986). "The atmospheric parameters and spectral interpolator for the MILES stars". Astronomy & Astrophysics. 531: A165. arXiv:1104.4952. Bibcode:2011A&A...531A.165P. doi:10.1051/0004-6361/201116769. S2CID 54940439.
  12. ^ Cite error: The named reference Royer2002 was invoked but never defined (see the help page).