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18443+3940
STFA 37 CI

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

18443+3940 STFA 37 CI

18^h 44^m 22.78^s +39° 36' 45.8" P.A. 36.00 sep 120.3 mag 5.25,10.12 Sp F0Vn dist. 47.69 pc (155.56 l.y.)

Coord 2000	18443+3940		Discov num	STFA 37		Comp	CI		Coord arcsec 2000	18 44 22.78 +39 36 45.8
Date first	1863		Date last	2023		Obs	19
Pa first	37		Pa last	36.2		P.A. Now (θ)	36.2°
Sep first	129.1		Sep last	120.28		Sep. Now (ρ)	120.28"
Mag pri	5.25		Mag sec	10.12		delta mag (ΔM)	4.87		Spectral class	F0Vn (yellow-white)
Pri motion ra	+008		Sec motion ra	-007
Pri motion dec	+054		Sec motion dec	-004
Notes	N (See Notes)

rPM=1.097

This double is not physical.

18443+3940 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		67310	18 44 20 +39 40 12	STF 2382 AB	2023	654	344	2.2	5.15	6.10	0.95	Y
Show	Double Double	67310	18 44 20 +39 40 12	STFA 37 AB,CD	2021	98	172	209.4	4.67	4.56	0.11
Show		67310	18 44 20 +39 40 12	STFA 37 AD	2021	19	172	208.2	5.15	5.38	0.23
Show		67310	18 44 20 +39 40 12	STFA 37 AI	2023	25	137	150.0	5.15	10.12	4.97
Show		67310	18 44 20 +39 40 14	STFA 37 BC	2011	14	172	210.9	6.10	5.25	0.85
Show		67310	18 44 20 +39 40 14	STFA 37 BD	2021	12	171	212.5	6.10	5.38	0.72
Show		67310	18 44 20 +39 40 14	STFA 37 BI	2015	10	137	151.3	6.10	10.12	4.02
Show		67315	18 44 23 +39 36 46	CHR 77 Ca,Cb	2005	5	225	0.1	5.25			Y
Show		67315	18 44 23 +39 36 46	STF 2383 CD	2023	655	73	2.4	5.25	5.38	0.13	Y
Show			18 44 23 +39 36 46	SHJ 277 CD,F	2023	4	359	91.5	4.56	12.70	8.14
Show			18 44 23 +39 36 46	SHJ 277 CD,G	2023	5	290	74.7	4.56	14.20	9.64
Show			18 44 23 +39 36 46	SHJ 277 CD,H	2023	5	311	94.9	4.56	13.90	9.34
Show			18 44 23 +39 36 46	STF 2383 CE	2023	9	332	61.8	5.25	12.30	7.05
Show		67315	18 44 23 +39 36 46	STFA 37 CI	2023	19	36	120.3	5.25	10.12	4.87		<===
Show		67315	18 44 23 +39 36 46	STFA 37 DI	2000	6	37	121.6	5.38	10.12	4.74
Show			18 44 20 +39 37 43	SHJ 277 EF	2023	17	36	45.3	12.30	12.70	0.40
Show			18 44 20 +39 37 43	SHJ 277 EG	2015	11	236	50.0	12.30	14.20	1.90
Show			18 44 20 +39 37 43	STFA 37 EI	2015	7	68	108.9	12.30	10.12	2.18
Show			18 44 17 +39 37 16	SHJ 277 GH	2015	13	358	35.8	14.20	13.90	0.30

11-fold system
11 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Var name	NSV11301 Lyr		Constellation	Lyra		SAO	67315		HIP	91926
Tycho2	3122-03439-2		Gaia DR2	2098202128093842432		HD	173607		HR	7053
GC	25668		ADS	11635		BD	BD+39 3510		Bayer	Epsilon 2 Lyrae
Bayer name	Eps2 Lyr		Flamsteed	5 Lyrae		Flamsteed name	5 Lyr		Distance	47.69
Distance ly	155.56		Bayer greek	ε² Lyr