6 Equulei information

6 Equulei
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Equuleus
Right ascension	21h 10m 31.31996s
Declination	10° 02′ 56.1180″
Apparent magnitude (V)	6.07
Characteristics
Evolutionary stage	main sequence
Spectral type	A2 Vs (A1 Si Sr Cr)
U−B color index	+0.04
B−V color index	+0.02
Astrometry
Radial velocity (Rv)	+6.9 km/s
Proper motion (μ)	RA: –2.696 mas/yr ; Dec.: +15.802 mas/yr
Parallax (π)	8.5862 ± 0.1086 mas
Distance	380 ± 5 ly ; (116 ± 1 pc)
Absolute magnitude (MV)	+0.236
Details
Mass	2.59±0.14 M☉
Radius	1.7 R☉
Luminosity	70.6+19.4; −15.2 L☉
Temperature	9,078+169; −165 K
Rotational velocity (v sin i)	65 km/s
Age	970 Myr
Other designations
	γ Equulei D, BD+09°4735, HD 201616, HIP 104538, HR 8098, SAO 126597
Database references
SIMBAD	data

6 Equulei is a probable (95% chance) astrometric binary^[9] star system in the northern constellation of Equuleus, located 380 light years from the Sun. It is barely visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 6.07.^[2] The system is moving further away from the Earth with a heliocentric radial velocity of +6.9 km/s.^[5] It forms a wide optical double with γ Equulei, at an angular separation of 336 arcseconds in 2011.^[10]

The visible component is an Ap star^[3] with a stellar classification of A2Vs,^[3] matching the evolutionary state of an A-type main sequence star while displaying "sharp" absorption lines. It is an estimated 970^[6] million years old with a projected rotational velocity of 65 km/s.^[3] The star has 2.6^[3] times the mass of the Sun and around 1.7^[7] times the Sun's radius. It is radiating 71^[3] times the luminosity of the Sun from its photosphere at an effective temperature of 9,078 K.^[3]

^ ^a ^b ^c ^d ^e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
^ Cite error: The named reference aaa498_3_961 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference gcsrv was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference wolframalpha was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference aaa367_521 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 Frankowski2007 was invoked but never defined (see the help page).
^ Cite error: The named reference wds2001 was invoked but never defined (see the help page).

[GaiaDR2-1] Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).

[clpl4_99-2] Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).

[zorec2012-3] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Cite error: The named reference zorec2012 was invoked but never defined (see the help page).

[aaa498_3_961-4] Cite error: The named reference aaa498_3_961 was invoked but never defined (see the help page).

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

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

[aaa367_521-7] Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).

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

[Frankowski2007-9] Cite error: The named reference Frankowski2007 was invoked but never defined (see the help page).

[wds2001-10] Cite error: The named reference wds2001 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Equuleus
Right ascension	21^h 10^m 31.31996^s^[1]
Declination	10° 02′ 56.1180″^[1]
Apparent magnitude (V)	6.07^[2]
Characteristics
Evolutionary stage	main sequence^[3]
Spectral type	A2 Vs^[3] (A1 Si Sr Cr)^[4]
U−B color index	+0.04^[2]
B−V color index	+0.02^[2]
Astrometry

Radial velocity (R_v)	+6.9^[5] km/s
Proper motion (μ)	RA: –2.696^[1] mas/yr Dec.: +15.802^[1] mas/yr
Parallax (π)	8.5862 ± 0.1086 mas^[1]
Distance	380 ± 5 ly (116 ± 1 pc)
Absolute magnitude (M_V)	+0.236^[6]

Details

Mass	2.59±0.14^[3] `M`_☉
Radius	1.7^[7] `R`_☉
Luminosity	70.6+19.4 −15.2^[3] `L`_☉
Temperature	9,078+169 −165^[3] K
Rotational velocity (v sin i)	65^[3] km/s
Age	970^[6] Myr

Other designations
γ Equulei D, BD+09°4735, HD 201616, HIP 104538, HR 8098, SAO 126597^[8]
Database references
SIMBAD	data

6 Equulei information

and 23 Related for: 6 Equulei information

6 Equulei

Equuleus

Alpha Equulei

Beta Equulei

Sarah Lee Lippincott

Delta Equulei

2 Equulei

Epsilon Equulei

3 Equulei

4 Equulei

HD 199942

HD 203842

U Equulei

HD 200964

SY Equulei

HD 200661

HD 201507

List of proper names of stars

HD 201298

Beta Aquarii

Hume Cronyn Memorial Observatory

HD 199223

27 Arietis