Rho2 Sagittarii information

Rho² Sagittarii
	Location of ρ2 Sagittarii (circled)
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Sagittarius
Right ascension	19h 21m 50.89574s
Declination	−18° 18′ 30.1996″
Apparent magnitude (V)	+5.87
Characteristics
Spectral type	K0 III
B−V color index	+1.06
Astrometry
Radial velocity (Rv)	−12.7±2.9 km/s
Proper motion (μ)	RA: +102.72 mas/yr ; Dec.: −93.20 mas/yr
Parallax (π)	9.82 ± 0.40 mas
Distance	330 ± 10 ly ; (102 ± 4 pc)
Absolute magnitude (MV)	+0.80
Details
Luminosity	60.4 L☉
Temperature	4,721 K
Other designations
	ρ2 Sgr, 45 Sgr, BD−18° 5325, HD 181645, HIP 95188, HR 7344, SAO 162521
Database references
SIMBAD	data

Rho² Sagittarii (ρ² Sagittarii) is a star in the zodiac constellation of Sagittarius. With an apparent visual magnitude of +5.87,^[2] it is near the lower limit of stars that can be seen with the naked eye. Based upon an annual parallax shift of 9.82 mas as seen from Earth,^[1] it is located around 330 light years from the Sun.

This is an evolved K-type giant star with a stellar classification of K0 III.^[3] As a result of a 1997 lunar occultation, a companion star was discovered at an angular separation of 21 mas. It appears to be an A-type main sequence star with a class of around A5. This companion was not detected during prior occultations by the Moon.^[8]

^ ^a ^b ^c ^d ^e ^f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ Cite error: The named reference Richichi1999 was invoked but never defined (see the help page).

[vanLeeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).

[Corben1968-2] Cite error: The named reference Corben1968 was invoked but never defined (see the help page).

[houk1978-3] Cite error: The named reference houk1978 was invoked but never defined (see the help page).

[Gontcharov2006-4] Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).

[Anderson2012-5] Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).

[Mcdonald2012-6] Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).

[SIMBAD-7] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[Richichi1999-8] Cite error: The named reference Richichi1999 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of ρ² Sagittarii (circled)
Constellation	Sagittarius
Right ascension	19^h 21^m 50.89574^s^[1]
Declination	−18° 18′ 30.1996″^[1]
Apparent magnitude (V)	+5.87^[2]
Characteristics
Spectral type	K0 III^[3]
B−V color index	+1.06^[2]
Astrometry

Radial velocity (R_v)	−12.7±2.9^[4] km/s
Proper motion (μ)	RA: +102.72^[1] mas/yr Dec.: −93.20^[1] mas/yr
Parallax (π)	9.82 ± 0.40 mas^[1]
Distance	330 ± 10 ly (102 ± 4 pc)
Absolute magnitude (M_V)	+0.80^[5]

Details

Luminosity	60.4^[6] `L`_☉
Temperature	4,721^[6] K

Other designations
ρ² Sgr, 45 Sgr, BD−18° 5325, HD 181645, HIP 95188, HR 7344, SAO 162521^[7]
Database references
SIMBAD	data