20585+5028 STF 2741 AB (HD 199955)

Coord 2000	20585+5028		Discov num	STF2741		Comp	AB		Coord arcsec 2000	20 58 30.03 +50 27 42.4
Date first	1783		Date last	2019		Obs	153
Pa first	44		Pa last	23.9		P.A. Now (θ)	23.9°
Sep first	1.2		Sep last	1.967		Sep. Now (ρ)	1.967"
Mag pri	5.94		Mag sec	6.79		delta mag (ΔM)	0.85		Spectral class	B5Vn (blue-white)
Pri motion ra	+005		Sec motion ra	+005
Pri motion dec	+003		Sec motion dec	+003
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 199955	33034	20 58 30 +50 27 42	STF 2741 AB	2019	153	24	2.0	5.94	6.79	0.85		<===
Show		33034	20 58 30 +50 27 42	STF 2741 AC	2003	5	355	138.6	5.94	11.77	5.83
Show			20 58 29 +50 30 01	BU 9007 CD	2015	6	50	13.3	12.30	13.30	1.00

Quadruple system
4 estimated visually detectable stars in this system

Name	HD 199955		Constellation	Cygnus		SAO	33034		HIP	103530
Tycho2	3583-01164-1		Gaia DR2	2168990198522326528		HD	199955		HR	8040
GC	29291		ADS	14504		BD	BD+49 3426		Distance	331.13
Distance ly	1080.15

discov_num	notes	refcode
STF2741	AB: H 1 97.	MEv2010

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

idgroup	discov	author
1	BU	Burnham, S.W. (BU 1 - 81)
179	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20585+5028	STF2741	AB	2006	143	26	1.9	5.94	6.79	B5Vn	D	205830.03+502742.4
20585+5028	STF2741	AB	2009	146	25	1.9	5.94	6.79	B5Vn	D	205830.03+502742.4
20585+5028	STF2741	AB	2012	147	25	1.9	5.94	6.79	B5Vn	N D	205830.03+502742.4
20585+5028	STF2741	AB	2013	153	25	2.0	5.94	6.79	B5Vn	N D	205830.03+502742.4
20585+5028	STF2741	AB	2015	146	25	2.0	5.94	6.79	B5Vn	NV	205830.03+502742.4
20585+5028	STF2741	AB	2016	148	25	2.0	5.94	6.79	B5Vn	NV	205830.03+502742.4
20585+5028	STF2741	AB	2017	151	25	2.0	5.94	6.79	B5Vn	NV	205830.03+502742.4
20585+5028	STF2741	AB	2018	152	25	2.0	5.94	6.79	B5Vn	NV	205830.03+502742.4
20585+5028	STF2741	AB	2019	153	25	2.0	5.94	6.79	B5Vn	NV	205830.03+502742.4

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	23/08/07	Daedalus1	mean difficulty	separated	25		Both stars are blue-white; primary seems somewhat brighter.

Show	date	username	difficulty	sep	sep_sigma	pa	pa_sigma	delta_mag	#	notes
Show	12/07/30	northisup	easy	2.00		29.00			1
Show	23/08/07	Daedalus1	mean difficulty	2.10	0.06	25.00	0.00	0.73	12	Seeing: Pickering 6, good

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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