From Wikipedia, the free encyclopedia
Star in the constellation Aquarius
28 Aquarii is a single
[9]
star located about 560
light years away from the
Sun in the
zodiac
constellation of
Aquarius . 28 Aquarii is the
Flamsteed designation .
[8] It is visible to the naked eye as a dim, orange-hued star with an
apparent visual magnitude of 5.6.
[2] This object is moving further from the Earth with a heliocentric
radial velocity of +8.1 km/s.
[5]
This 2.9
[7] billion year old object is an aging
giant star with a
stellar classification of K2 III.
[3] After exhausting the hydrogen at its
core , this star
evolved off the
main sequence and has now expanded to 28
[1] times the
Sun's radius . It has 1.47 times the
mass of the Sun and is radiating 258
[1] times the
Sun's luminosity from its swollen
photosphere at an
effective temperature of 4,361 K.
[7]
References
^
a
b
c
d
e
f
g
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 .
^
a
b 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 .
^
a
b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey . 5 .
Bibcode :
1999MSS...C05....0H .
^
a
b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99.
Bibcode :
1966CoLPL...4...99J .
^
a
b Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S. (2002). "Radial Velocities for 889 Late‐Type Stars". The Astrophysical Journal Supplement Series . 141 (2): 503–522.
arXiv :
astro-ph/0112477 .
Bibcode :
2002ApJS..141..503N .
doi :
10.1086/340570 .
S2CID
51814894 .
^
a
b 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 .
^
a
b
c Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo; Aguirre, Victor Silva; Zamora, Olga (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society . 456 (4): 3655.
arXiv :
1511.08203 .
Bibcode :
2016MNRAS.456.3655M .
doi :
10.1093/mnras/stv2830 .
^
a
b
"* 28 Aqr" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 30 January 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 .