91 Aquarii

Starbox begin
name = 91 Aquarii Starbox observe
epoch = J2000.0
constell = Aquarius
ra = RA|23|15|53.5
dec = DEC|−9|05|16
appmag_v = +4.24 Starbox character
class = K0III
r-i = 0.56
v-r =
b-v = 1.11
u-b = 0.99
variable = Starbox astrometry
radial_v = -26.4 ± 0.9
prop_mo_ra = 368.56 ± 1.46
prop_mo_dec = -17.02 ± 0.7
parallax = 21.97
p_error = 0.89
dist_ly = 148
dist_pc = 46
absmag_v = 0.95 Starbox detail
age =
metal = -0.085 (± 0.055)
mass = 2.5
radius = 8.55
rotation =< 17 Km/s
0,0698 Year
luminosity = 33
gravity=
temperature = 5250 Starbox visbin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401325076&Name=GJ%20%20%20893.2%20B ψ¹ Aqr B
(GJ 893.2 B)]
period=
axis=49.6
eccentricity=
inclination=312
node=
periastron=Starbox visbin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401325074&Name=G%20157-37 ψ¹ Aqr C
(G 157-37)]
period=
axis=0.2
eccentricity=
inclination=101
node=
periastron=Starbox visbin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401325077&Name=GJ%20%20%20893.2%20C ψ¹ Aqr D
(GJ 893.2 C)]
period=
axis=80.4
eccentricity=
inclination=274
node=
periastron=Starbox visbin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401325079&Name=BD-09%20%206156D ψ¹ Aqr E
(BD-09 6156D)]
period=
axis=19.7
eccentricity=
inclination=341
node=
periastron=Starbox visbin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401325075&Name=BD-09%20%206155E ψ¹ Aqr F
(BD-09 6155E)]
period=
axis=
eccentricity=
inclination=
node=
periastron=Starbox catalog
names = Psi¹ Aquarii, Gl 893.2, HR 8841, HD 219449, BD-09°6156, FK5 1608, HIP 114855, SAO 146598, GC 32374, ADS 16633, CCDM 23159-0905. Starbox reference
Simbad=HD+219449
ARICNS = Starbox reference
Simbad=ADS+16633

91 Aquarii, also known as Psi¹ Aquarii (bayer-blank|ψ|1|Aqr / bayer-blank|ψ|1|Aquarii), is a multiple star system approximately 148 light-years away in the constellation of Aquarius. The system comprises five stars, with the primary star being an orange giant star. As of 2003, an extrasolar planet is known to orbit the primary star.

Star system

The primary star (91 Aquarii A) is an orange giant star with an apparent magnitude of +4.24. At a separation of 49.6 arcseconds from the primary is a binary companion composed of two 10th magnitude stars (91 Aquarii B and C). They are 0.3 arcseconds from each other. The system has two other components, the 13th magnitude (91 Aquarii D) 80.4 arcseconds from the primary and the 14th magnitude (91 Aquarii E) 19.7 arcseconds from B.

Planetary system

In 2003, the discovery of an extrasolar planet orbiting a giant star was announced.

PlanetboxOrbit
exoplanet = b
mass = >2.9
period = 182
semimajor = 0.3
eccentricity = 0

See also

* Aldebaran
* Iota Draconis
* Pollux (star)

External links

* [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=Psi1+Aquarii&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2006&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0 SIMBAD: HD 219449 -- High proper-motion Star]
* [http://exoplanet.eu/star.php?st=HD+219449 Extrasolar Planets Encyclopaedia: HD 219449]
* [http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=215 Extrasolar Visions: 91 Aquarii]
* [http://www.alcyone.de/cgi-bin/search.pl?object=HR8841 Alcyone Software: HR 8841]
* [http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HD+219449&planete=b Orbit simulation]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=NLTT+56282&ident=NLTT+56282&submit=Aladin+previewer Image Psi Aquarii]
* [http://server6.sky-map.org/starview?object_type=1&object_id=835&locale=ZH sky-map.org/]
* [http://planetquest.jpl.nasa.gov/atlas/atlas_search.cfm planetquest.jpl.nasa.gov]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%208841 HR 8841] Catalog