31 Aquilae

Starbox begin
name=31 Aquilae Starbox image


caption = 31 Aquilae Starbox observe
epoch=J2000
ra=19^h 24^m 58.2004^s
dec= +11° 56′ 39.896″
appmag_v=5.16
constell=Aquila Starbox character
class=G8IV
b-v=0.77
u-b=0.45
r-i =
v-r =
variable=Variable star Starbox astrometry
radial_v=-100.1
prop_mo_ra=721.36
prop_mo_dec= 643.67
parallax=66.01
p_error=0.77
absmag_v=5.93 Starbox detail
mass=1,1
radius=1,1
luminosity=1,2 | temperature=5,000–6,000
metal=?
rotation=< 17 Km/s
0,008981 Year
age=? Starbox visbin
name=31 Aquilae B
period=
axis=98.7
eccentricity=
inclination=335
node=
periastron=

Starbox visbin
name=31 Aquilae C
period=
axis=114.2
eccentricity=
inclination=316
node=
periastron=

Starbox catalog
names=b Aql, NSV 11994, GCRV 11861, LTT 15668, SRS 31503, 2MASS J19245822+1156401, TD1 24621, GJ 759, N30 4300, TYC 1063-519-1, AG+11° 2263, HD 182572, NLTT 47763, UBV 16443, ASCC 976604, HIC 95447, PLX 4541, UBV M 23748, BD+11° 3833, HIP 95447, PMC 90-93 1065, USNO-B1.0 1019-00522349, CCDM J19249+1157A, HR 7373, PM 19226+1150, YZ 11 7220, Ci 20 1152, IDS 19202+1143 A, PPM 136256, CSI+11 3833 1, IRAS 19226+1150, ROT 2792, CSV 101833, LFT 1477, SAO 104807, FK5 1503, LHS 3463, GC 26809, LSPM J1924+1156, SPOCS 840. Starbox reference
Simbad=HD+182572
ARICNS = Starbox reference
Simbad=IDS+19202%2B1143

31 Aquilae (b Aquilae) is a subgiant star in the constellation Aquila. Its apparent magnitude is 5.17. Its age is probably similar to NGC 188,the oldest open cluster known, which was calculated to be over 5 billion years. For its age, it is surprisingly metal rich, contrary to common assumptions that the oldest stars should be metal-poor.

References

* [http://www.journals.uchicago.edu/cgi-bin/resolve?d=doi:10.1086/151065&erFrom=2332516747766327459Guest The Old Disk Metal-Rich Subgiant 31 Aquilae]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=NSV+11994&ident=NSV+11994&submit=Aladin+previewer Image 31 Aquilae]
* [http://www.alcyone.de/cgi-bin/search.pl?object=HR7373 HR 7373]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207373 HR 7373]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J19249%2b1157A CCDM 19249+1157]

Components