WDS 02157+2503 COU 79 AB (21 Ari)

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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

WDS 02157+2503 COU 79 AB (21 Ari) : NOTES

discov_num	notes	refcode
COU 79	21 Ari. Couteau & Morel (1982) computed masses disagree with spectral	Cou1982d
	type. Authors suggest 3rd component (mass ~1 Msun) as possible
	explanation. 1985.8375: This measure was erroneously attributed to
	02130+0851 = MCA 5 by McAlister et al. (1987). The data were re-reduced	McA1987b
	by Hartkopf et al., giving similar results. The measure has now been	Hrt1996a
	replaced by the mean of the two separate reduction results.
	1986.567: The separation of this partially resolved pair was
	calculated under the assumption of zero or otherwise known magnitude
	difference. Pair passed periastron earlier than predicted; now the
	orbit is definitive	Tok1985
	Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
	masses of 3.09 +/- 0.30, 3.04, and 1.17 Msun, respectively.	Mlk2012

REFERENCES

refcode	metd	author	reference
Cou1982d	orb -	Couteau, P. & Morel, P.J.	1982A&A...105..323C
Cou1982d		A&A 105, 323, 1982
Hrt1996a	Sc j	Hartkopf, W.I., Mason, B.D., & McAlister, H.A.	1996AJ....111..370H
Hrt1996a	+orb	AJ 111, 370, 1996
McA1987b	Sc j	McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G.	1987AJ.....93..688M
McA1987b		AJ 93, 688, 1987
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Tok1985	Ig u	Tokovinin, A.A.	1985A&AS...61..483T
Tok1985		A&AS 61, 483, 1985

DISCOVERER

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.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
02157+2503	COU 79	AB	2014	219	39	0.2	6.40	6.48	F6V	NOW	021542.83+250235.7

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