23588+3156 RBR 55 Aa,Ab (HD 224531)

Coord 2000	23588+3156		Discov num	RBR  55		Comp	Aa,Ab		Coord arcsec 2000	23 58 45.83 +31 56 22.1
Date first	2013		Date last	2015		Obs	2
Pa first	348		Pa last	351.2		P.A. Now (θ)	351.2°
Sep first	0.4		Sep last	0.43		Sep. Now (ρ)	0.43"
Mag pri	6.70		Mag sec	11.10		delta mag (ΔM)	4.4		Spectral class	G5 (yellow)
Pri motion ra	+072		Sec motion ra
Pri motion dec	-142		Sec motion dec
Notes	N K (See Notes, 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 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 224531	73646	23 58 46 +31 56 22	RBR 55 Aa,Ab	2015	2	351	0.4	6.70	11.10	4.40		<===
Show		73646	23 58 46 +31 56 22	RAO 76 AB	2016	7	87	4.8	8.35	15.00	6.65

Triple system
2 estimated visually detectable stars in this system

Name	HD 224531		Constellation	Pegasus		SAO	73646		HIP	118213
Tycho2	2772-00055-1		Gaia DR2	2873792961698940288		HD	224531		BD	BD+31 5011
Distance	49.6		Distance ly	161.8

discov_num	notes	refcode
RAO 76	A is SB and astrometric binary.	Tok2014d
	Previously thought to be a binary, but our observations reveal that
	it is actually a triple system. The outer component B at 4".8 was
	discovered by Robo-AO and confirmed by the 2MASS image and by the new
	data presented here. It is located near the low end of the MS. The
	main star with astrometric acceleration (Makarov & Kaplan 2005) is	Mkr2005
	now resolved at 0".4, corresponding to an orbital period of ~100 yr.
	The new component Ab is too faint for its detection in the i' band
	with Robo-AO.	Rbr2015d
RBR 55	Aa,Ab: incorrectly labelled RBR 30 in Table 1 of Roberts et al.	Rbr2015d

refcode	metd	author	reference
Mkr2005	-	Makarov, V.V. & Kaplan, G.H.	2005AJ....129.2420M
Mkr2005		AJ 129, 2420, 2005
Rbr2015d	Ac j	Roberts, L.C., Jr., Tokovinin, A., Mason, B.D., Hartkopf, W.I., & Riddle, R.L.	2015AJ....150..130R
Rbr2015d	+A	AJ 150, 130, 2015
Tok2014d	E2 -	Tokovinin, A.	2014AJ....147...86T
Tok2014d		AJ 147, 86, 2014

idgroup	discov	author
1	RAO	Robo AO (Palomar 60" AO project or KPNO 2.1m)
1	RAO	Law, N.M., Morton, T., Baranec, C., Riddle, R., Ravichandran, G., Ziegler, C.,
1	RAO	Johnson, J.A., Tendulkar, S.P., Bui, K., Burse, M.P., Das, H., Dekany, R., et al.
2	RAO	Riddle, R.L., Tokovinin, A., Mason, B.D., Hartkopf, W.I., Roberts, L.C., Jr.,
2	RAO	Baranec, C., Law, N.M., Bui, K., Burse, M.P., Das, H.K., Dekany, R.G.,
2	RAO	Kulkarni, S., Punnadi, S., Ramaprakash, A.N., & Tendulkar, S.P.
7	RAO	Baranec, C., Ziegler, C., Law, N.M., Morton, T., Riddle, R.L., Atkinson, D.,
7	RAO	Schonhut, J., & Crepp, J.
8	RAO	Ziegler, C., Law, N.M., Nicholas, M., Morton, T., Baranec, C., Riddle, R.L.,
8	RAO	Atkinson, D., Baker, A., Roberts, S., & Ciardi, D.R.
9	RAO	Schonhut-Stasik, J.S., Baranec, C., Huber, D., Ziegler, C., Atkinson, D., Gaidos,
9	RAO	E., Law, N.M., Riddle, R., Hagelberg, J., van der Marel, N., & Hodapp, K.W.
10	RAO	Hillenbrand, L.A., Zhang, C., Riddle, R.L., Baranec, C., Ziegler, C., Law, N.M. &
10	RAO	Stauffer, J.
12	RAO	Ziegler, C., Law, N.M., Baranec, C., Riddle, R., Duev, D.A., Howard, W.,
12	RAO	Jensen-Clem, R., Kulkarni, S.R., Morton, T. & Salama, M.
13	RAO	Ziegler, C., Law, N.M., Baranec, C., Morton, T., Riddle, R., De Lee, N., Huber, D.,
13	RAO	Mahadevan, S. & Pepper, J.
14	RAO	Bowler, B.P., Hinkley, S., Ziegler, C., Baranec, C., Gizis, J.E., Law, N.M., Liu,
14	RAO	M.C., Shah, V.S., Shkolnik, E.L., Riaz, B. & Riddle, R.
15	RAO	Schonhut-Stasik, J.S., Huber, D., Baranec, C., Lamman, C., Salama, M., Jensen-Clem,
15	RAO	R., Duev, D.A., Riddle, R., Kulkarni, S.R. & Law, N.M.
16	RAO	Lamman, C., Baranec, C., Berta-Thompson, Z.K., Law, N.M., Schonhut-Stasik, J.,
16	RAO	Ziegler, C., Salama, M., Jensen-Clem, R., Duev, D.A., Riddle, R., Kulkarni, S.R.,
16	RAO	Winters, J.G. & Irwin, J.M.
19	RAO	Salama, M., Ou, J., Barance, C., Liu, M.C., Bowler, B.P., Barnes, P., Bonnet, M.,
19	RAO	Chun, M., Duev, D.A., Goebel, S., Hall, D., Jacobson, S., Jensen-Clem, R., Law,
19	RAO	N.M., Lockhart, C., Riddle, R., Situ, H., Warmbier, E. & Zhang, Z.
20	RAO	Salama, M., Ziegler, C., Baranec, C., Liu, M.C., Law, N.M., Riddle, R., Henry,
20	RAO	T.J., Winters, J.G., Jao, W.-C., Ou, J. & Ruiz, A.H.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
23588+3156	RBR 55	Aa,Ab	2015	2	351	0.4	6.70	11.10	G5	N K	235845.83+315622.1

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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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