22359+3938 STF 2922 AB (8 Lac)

Coord 2000	22359+3938		Discov num	STF2922		Comp	AB		Coord arcsec 2000	22 35 52.28 +39 38 03.6
Date first	1782		Date last	2020		Obs	171
Pa first	186		Pa last	185.5		P.A. Now (θ)	185.5°
Sep first	17.2		Sep last	22.48		Sep. Now (ρ)	22.48"
Mag pri	5.66		Mag sec	6.29		delta mag (ΔM)	0.63		Spectral class	B2Ve+B5 (blue-white/blue-white)
Pri motion ra	+001		Sec motion ra	-014
Pri motion dec	-004		Sec motion dec	-006
Notes	N (See Notes)

rPM=0.994 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		72508	22 35 52 +39 38 04	CHR 112 Aa,Ab	2020	34	138	0.0	5.66			Y
Show	8 Lac	72508	22 35 52 +39 38 04	STF 2922 AB	2020	171	186	22.5	5.66	6.29	0.63		<===
Show		72508	22 35 52 +39 38 04	A 1469 AC	2016	30	167	48.8	5.66	10.38	4.72
Show		72508	22 35 52 +39 38 04	A 1469 AD	2017	64	145	81.6	5.66	9.08	3.42
Show		72508	22 35 52 +39 38 04	A 1469 AE	2016	19	239	335.2	5.66	7.25	1.59
Show		72508	22 35 52 +39 38 04	DAL 28 AG	2015	6	193	77.6	5.66	14.08	8.42
Show		72509	22 35 52 +39 37 41	STF 2922 BC	2016	49	154	28.3	6.29	10.38	4.09
Show		72509	22 35 52 +39 37 41	A 1469 BD	2016	52	130	66.9	6.29	9.08	2.79
Show		72509	22 35 52 +39 37 41	A 1469 BE	2009	15	242	324.0	6.29	7.25	0.96
Show		72509	22 35 52 +39 37 41	COM 8 BF	2012	6	175	127.6	6.29	10.97	4.68
Show			22 35 53 +39 37 16	A 1469 CD	2016	32	115	42.4	10.38	9.08	1.30
Show			22 35 53 +39 37 16	A 1469 CH	2015	3	255	1.7	10.38	14.60	4.22
Show			22 35 56 +39 36 58	A 1469 DI	2015	14	227	10.0	9.08	13.30	4.22
Show			22 35 51 +39 36 48	DAL 28 GJ	2016	9	78	6.5	14.08	12.99	1.09

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

Name	8 Lac		Var name	NSV14242 Lac		Constellation	Lacerta		SAO	72508
HIP	111546		Tycho2	3205-02482-1		Gaia DR2	1908368597999299840		HD	214167
HR	8603		GC	31550		ADS	16095		BD	BD+38 4808
Flamsteed	8 Lacertae		Flamsteed name	8 Lac		Distance	662.25		Distance ly	2160.26

discov_num	notes	refcode
CHR 112	8 Lac. A shows variable velocity, possibly due to motion in the Aa,Ab
	system. Shell star.
STF2922	AB: H 4 86.	MEv2010

refcode	metd	author	reference
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)

idgroup	discov	author
1	A	Aitken, R.G.
312	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)
314	COM	Comstock, G.C.
341	DAL	Daley, J.A.
391	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
22359+3938	STF2922	AB	2007	146	185	22.2	5.66	6.29	B2Ve B5	D	223552.28+393803.6
22359+3938	STF2922	AB	2008	149	185	22.2	5.66	6.29	B2Ve B5	D	223552.28+393803.6
22359+3938	STF2922	AB	2010	152	185	22.4	5.66	6.29	B2Ve B5	N D	223552.28+393803.6
22359+3938	STF2922	AB	2011	155	186	22.4	5.66	6.29	B2Ve B5	N D	223552.28+393803.6
22359+3938	STF2922	AB	2012	156	185	22.3	5.66	6.29	B2Ve B5	N D	223552.28+393803.6
22359+3938	STF2922	AB	2014	163	185	22.4	5.66	6.29	B2Ve B5	N D	223552.28+393803.6
22359+3938	STF2922	AB	2016	165	185	22.5	5.66	6.29	B2Ve+B5	N	223552.28+393803.6
22359+3938	STF2922	AB	2017	167	185	22.3	5.66	6.29	B2Ve+B5	N	223552.28+393803.6
22359+3938	STF2922	AB	2018	169	186	22.3	5.66	6.29	B2Ve+B5	N	223552.28+393803.6
22359+3938	STF2922	AB	2020	171	186	22.5	5.66	6.29	B2Ve+B5	N	223552.28+393803.6

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

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	23/07/24	Daedalus1	mean difficulty	separated	186		A pair of white, evenly matched stars, the two brightest stars in a small group.

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	23/07/24	Daedalus1	mean difficulty	22.46	0.07	186.00	0.00	0.02	12	Seeing: Pickering 5, poor

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