20298+0941 CRC 37 AD

Coord 2000	20298+0941		Discov num	CRC  37		Comp	AD		Coord arcsec 2000	20 29 48.41 +09 41 19.3
Date first	2012		Date last	2012		Obs	1
Pa first	201		Pa last	201		P.A. Now (θ)	201°
Sep first	9.2		Sep last	9.2		Sep. Now (ρ)	9.2"
Mag pri	8.20		Mag sec			delta mag (ΔM)			Spectral class	M4.5V (red)
Pri motion ra	+669		Sec motion ra
Pri motion dec	+101		Sec motion dec
Notes	U K (Proper motion indicates non-physical, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes This double is not physical.

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name

SAO

coord

wds_name

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

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20 29 48 +09 41 19

AST 2 AB

2021

30

94

0.2

13.11

16.38

3.27

Y

Show

20 29 48 +09 41 19

CRC 37 AD

2012

1

201

9.2

8.20

<===

Triple system
3 estimated visually detectable stars in this system

Constellation

Delphinus

discov_num	notes	refcode
AST 2	AB: GJ 791.2 = HU Del. HST Fine Guidance Sensor data were used by
	Benedict et al. (2000) to derive perturbation orbital parameters,	AST2000
	distance, component masses, and absolute magnitudes for this nearby
	low-mass binary. Published measures are of the primary relative to the
	barycenter. The authors calculate a true semi-major axis of 108.8
	+/- 0.7 mas, while Harrington (1971) calculates a value of 0".10.	Hrr1971
	Harrington determined a delta-m in excess of 3, in agreement with the
	HST measures.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	As the measures relative to the barycenter were cataloged as measures	AST2000
	of AB, the first measure of AB was cataloged as JNN 282. The pair is	Jnn2014
	a simple binary. Identity first suggested by Knapp.	Kpp2019n
	Estimated age 30-300 Myr; masses 0.19+/-0.08 and 0.05+/-0.03 Msun	Jnn2014
	a ~1.4au.

refcode	metd	author	reference
AST2000	Hf j	Benedict, G.F., McArthur, B.E., Franz, O.G., Wasserman, L.H., & Henry, T.J.	2000AJ....120.1106B
AST2000	+orb	AJ 120, 1106, 2000
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Hrr1971	orb -	Harrington, R.S.	1971AJ.....76..930H
Hrr1971		AJ 76, 930, 1971
Jnn2014	A -	Janson, M., Bergfors, C., Brandner, W., Kudryavtseva, N., Hormuth, F.,	2014ApJ...789..102J
Jnn2014	+Cl	Hippler, S., & Henning, T.
Jnn2014		ApJ 789, 102, 2014
Kpp2019n	not u	Knapp, W.R.A.	...................
Kpp2019n		private communication, 2019 (31 October email)

idgroup	discov	author
1	CRC	Cortes-Contreras, M., Caballero, J.A. & Montes, D.
4	CRC	Cortes-Contreras, M., Bejar, V.J.S., Caballero, J.A., Gauza, B., Montes, D.,
4	CRC	Alonso-Floriano, F.J., Jeffers, S.V., Morales, J.C., Reiners, A., Ribas, I.,
4	CRC	Schofer, P., Quirrenbach, A., Amado, P.J., Mundt, R. & Seifert, W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20298+0941	CRC 37	AD	2012	1	201	9.2	8.20		M4.5V	UK	202948.34+094120.2

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

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