WDS 12154+5702 BLL 29 AB (Megrez)

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

WDS 12154+5702 BLL 29 AB (Megrez) : NOTES

discov_num	notes	refcode
BLL 29	69 UMa = del UMa = Megrez. Smyth's quoted separation is difference in	Smy1844
	RA only.

REFERENCES

refcode	metd	author	reference
Smy1844	Ma -	Smyth, W.H.	1844QB43.S66.......
Smy1844		Cycle of Celestial Objects 2, 1844

DISCOVERER

idgroup	discov	author
1	BLL	Ball, R.S.
8	BUP	Burnham proper motion stars (see Burnham, Carnegie Inst. Wash. #168, 1913)
8	JNN	Janson, M., Brandner, W., Henning, T., & Zinnecker, H.
9	JNN	Janson, M., Brandner, W., Lenzen, R., Close, L., Nielsen, E., Hartung, M.,
9	JNN	Henning, T., & Rouy, H.
10	JNN	Janson, M., Carson, J., Thalmann, C., McElwain, M.W., Goto, M., Crepp, J.,
10	JNN	Wisniewski, J., Abe, L., et al.
11	JNN	Janson, M., Bonavita, M., Klahr, H., Lafreniere, D., Jayawardhana, R.,
11	JNN	& Zinnecker, H.
12	JNN	Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S.,
12	JNN	Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
13	JNN	Janson, M., Jayawardhana, R., Girard, J.H., Lafreniere, D., Bonavita, M.,
13	JNN	Gizis, J., & Brandeker, A.
14	JNN	Janson, M., Lafreniere, D., Jayawardhana, R., Bonavita, M., Girard, J.H.,
14	JNN	Brandeker, A., & Gizis, J.E.
15	JNN	Janson, M., Brandt, T.D., Moro-Martin, A., Usuda, T., Thalmann, C., Carson, J.C.,
15	JNN	Goto, M., Currie, T., McElwain, M.W., Itoh, Y., Fukagawa, M., Crepp, J., et al.
16	JNN	Janson, M., Bergfors, C., Brandner, W., Kudryavtseva, N., Hormuth, F.,
16	JNN	Hippler, S., & Henning, T.
17	JNN	Janson, M., Bergfors, C., Brandner, W., Bonnefoy, M., Schlieder, J., Kohler, R.,
17	JNN	Hormuth, F., Henning, T., & Hippler, S.
19	JNN	Janson, M., Durkan, S., Hippler, S., Dai, X., Brandner, W., Schlieder, J.,
19	JNN	Bonnefoy, M., & Henning, T. Jnn201
20	JNN	Calissendorff, P., Janson, M., Kohler, R., Durkan, S., Hippler, S., Dai, X.,
20	JNN	Brandner, W., Schlieder, J., & Henning, T.
21	JNN	Janson, M., Durkan, S., Bonnefoy, M., Rodet, L., Kohler, R., Lacour, S., Brandner,
21	JNN	W., Henning, R. & Girard, J.
24	JNN	Calissendorff, P., Janson, M., Rodet, L., Bonnefoy, M., Brandner, W., Brown-Sevilla,
24	JNN	S., Chauvin, G., Delorme, P., Desidera, S., Durkan, S., Fontanive, C., Gratton, R.,
24	JNN	Hagelbe3rg, J., Henning, T., Hippler, S., Lagrange, A.-M., Langlois, M., Lazzoni, C.
24	JNN	Maire, A.-L., Messina, S., Meyer, M., Moller-Nsson, O., Rabus, M., Schlieder, J.,
24	JNN	Vigan, A., Wahhaj, Z., Wildi, F. & Zurlo, A.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
12154+5702	BLL 29	AB	2002	11	73	182.7	3.30	10.21	A3V	N D	121525.45+570157.4
12154+5702	BLL 29	AB	2008	12	74	182.0	3.30	10.21	A3V	N D	121525.45+570157.4
12154+5702	BLL 29	AB	2012	14	73	180.7	3.30	10.21	A3V	N D	121525.45+570157.4
12154+5702	BLL 29	AB	2014	15	73	179.7	3.30	10.21	A3V	N	121525.45+570157.4
12154+5702	BLL 29	AB	2015	16	73	180.3	3.30	10.21	A3V	N	121525.45+570157.4
12154+5702	BLL 29	AB	2020	17	75	181.9	3.30	10.21	A3V	N	121525.45+570157.4

If you need more information about this double, apply for a data request form to the WDS.