15495+2528 STF 1977 AB (HD 141690)

Coord 2000	15495+2528		Discov num	STF1977		Comp	AB		Coord arcsec 2000	15 49 32.92 +25 27 36.7
Date first	1831		Date last	2019		Obs	32
Pa first	358		Pa last	356.2		P.A. Now (θ)	356.2°
Sep first	14.1		Sep last	13.925		Sep. Now (ρ)	13.925"
Mag pri	8.76		Mag sec	10.95		delta mag (ΔM)	2.19		Spectral class	G0IV (yellow)
Pri motion ra	-047		Sec motion ra	-047
Pri motion dec	+005		Sec motion dec	+006
Notes	N (See Notes)

rPM=0.021 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		84018	15 49 33 +25 27 37	WSI 111 Aa,Ab	2021	4	307	0.2	9.00	10.50	1.50
Show	HD 141690	84018	15 49 33 +25 27 37	STF 1977 AB	2019	32	356	13.9	8.76	10.95	2.19		<===
Show		84018	15 49 33 +25 27 37	WSI 111 Aa,C	2021	3	114	0.5	9.00	13.10	4.10

Quadruple system
3 estimated visually detectable stars in this system

Name	HD 141690		Constellation	Serpens		SAO	84018		HIP	77503
Tycho2	2037-00751-1		Gaia DR2	1219872421187175936		HD	141690		GC	21275
BD	BD+25 2973		Distance	92.51		Distance ly	301.77

discov_num	notes	refcode
STF1977	Griffin & Duquennoy report that the primary is composed of a SpB1 plus	Grf1993
	a more distant companion. Thus the system is quadruple.

refcode	metd	author	reference
Grf1993	not -	Griffin, R.F. & Duquennoy, A.	1993Obs...113..128G
Grf1993		Observatory 113, 128, 1993

idgroup	discov	author
1	STF	Struve, F.G.W.
34	WSI	Douglass, G.G., Hindsley, R.B., & Worley, C.E.
43	WSI	Mason, B.D., Hartkopf, W.I., Holdenried, E.R., Rafferty, T.J., Wycoff, G.L.,
43	WSI	Hennessy, G.S., Hall, D.M., Urban, S.E., et al.
46	WSI	Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Holdenried, E.R., Platais, I.,
46	WSI	Rafferty, T.J., Hall, D.M., Hennessy, G.S., et al.
47	WSI	Mason, B.D., Hartkopf, W.I., Urban, S.E., Wycoff, G.L., Pascu, D., Hall, D.M.,
47	WSI	Hennessy, G.S., Platais, I., et al.
48	WSI	Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Pascu, D., Urban, S.E., Hall, D.M.,
48	WSI	Hennessy, G.S., Rafferty, T.J., et al.
75	WSI	Mason, B.D., Hartkopf, W.I., Bredthauer, G., Ferguson, E.W., Finch, C.T., Kilian,
75	WSI	C.M., Rafferty, T.J., Ragan, T.J. & Wieder, G.D.
85	WSI	Mason, B.D., Williams, S.J., Matson, R.A., Josties, J.D., Eakens, P.D., Justice,
85	WSI	M., Kilian, C.M. & Warner, R.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
15495+2528	STF1977	AB	2000	21	356	13.9	8.76	10.95	G0IV	N D	154932.92+252736.7
15495+2528	STF1977	AB	2010	22	356	13.9	8.76	10.95	G0IV	N D	154932.92+252736.7
15495+2528	STF1977	AB	2015	25	356	13.9	8.76	10.95	G0IV	N	154932.92+252736.7
15495+2528	STF1977	AB	2019	30	356	13.9	8.76	10.95	G0IV	N	154932.92+252736.7

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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

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS