18181-1215 BRT2749KJ

Coord 2000	18181-1215		Discov num	BRT2749		Comp	KJ		Coord arcsec 2000	18 18 02.62 -12 14 39.8
Date first	1906		Date last	2000		Obs	5
Pa first	118		Pa last	121		P.A. Now (θ)	121°
Sep first	4.9		Sep last	4.4		Sep. Now (ρ)	4.4"
Mag pri	10.51		Mag sec	11.42		delta mag (ΔM)	0.91		Spectral class	B (blue-white)
Pri motion ra	-001		Sec motion ra
Pri motion dec	-006		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		161292	18181-1215	DBK 1	Aa,Ab	2008	2016	15	273	0.0	7.45			Y
Show	MY Ser	161292	18181-1215	TRN 27	AB	2001	2012	3	40	4.8	7.45	16.00	8.55
Show		161292	18181-1215	SS 7	AC	1953	2015	4	191	14.3	7.45	14.30	6.85
Show		161292	18181-1215	SS 7	AD	1906	2015	8	260	18.1	7.45	12.90	5.45
Show		161292	18181-1215	SS 7	AE	1906	2015	7	217	18.0	7.45	13.00	5.55
Show		161292	18181-1215	SS 7	AF	1906	2015	11	16	30.2	7.45	10.80	3.35
Show		161292	18181-1215	SS 7	AG	1953	2015	5	9	39.5	7.45	15.50	8.05
Show		161292	18181-1215	SS 7	AH	1907	2017	8	269	40.8	7.45	9.80	2.35
Show		161292	18181-1215	SS 7	AI	1953	2015	4	299	45.6	7.45	13.70	6.25
Show		161292	18181-1215	SS 7	AJ	1906	2015	5	258	45.2	7.45	11.42	3.97
Show		161292	18181-1215	SS 7	AK	1907	2000	4	262	48.6	7.45	10.51	3.06
Show		161292	18181-1215	SS 7	AL	1953	2015	5	348	51.8	7.45	14.50	7.05
Show		161292	18181-1215	SS 7	AM	1953	2015	5	255	64.3	7.45	15.30	7.85
Show		161292	18181-1215	SS 7	AN	1953	2015	5	280	71.2	7.45	15.10	7.65
Show		161292	18181-1215	SS 7	AO	1953	2015	5	305	72.0	7.45	15.90	8.45
Show		161292	18181-1215	SS 7	AP	1907	2015	7	286	72.6	7.45	10.40	2.95
Show		161292	18181-1215	SS 7	AQ	1907	2015	6	291	84.9	7.45	11.70	4.25
Show		161292	18181-1215	BRT2749	KJ	1906	2000	5	121	4.4	10.51	11.42	0.91		<===

18-fold system
17 visible stars in this system

Precise pa	121		Precise sep	4.383		Var name	MY Ser		Constellation	Serpens
SAO	161292		HIP	89681		Tycho2	5685-04407-1		Gaia DR2	4153657340054934528
HD	167971		BD	BD-12 4980		Distance	662.25		Distance ly	2160.26

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18181-1215	BRT2749	KJ	2000	4	121	4.4	10.51	11.42	B		181802.62-121439.8

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