02128+7941 S 405 AB (HD 12927)

Coord 2000	02128+7941		Discov num	S   405		Comp	AB		Coord arcsec 2000	02 12 49.98 +79 41 29.3
Date first	1782		Date last	2019		Obs	33
Pa first	274		Pa last	277.2		P.A. Now (θ)	277.2°
Sep first	51.0		Sep last	55.654		Sep. Now (ρ)	55.654"
Mag pri	6.47		Mag sec	7.15		delta mag (ΔM)	0.68		Spectral class	A5III (white)
Pri motion ra	-023		Sec motion ra	-019
Pri motion dec	+024		Sec motion dec	+021
Notes	N (See Notes)

rPM=0.15 (< 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	HD 12927	4594	02 12 50 +79 41 29	S 405 AB	2019	33	277	55.7	6.47	7.15	0.68		<===
Show		4592	02 12 29 +79 41 36	S 405 BC	2015	7	224	51.2	7.16	13.90	6.74

Triple system
3 estimated visually detectable stars in this system

Name	HD 12927		Constellation	Cepheus		SAO	4594		HIP	10309
Tycho2	4503-01788-1		Gaia DR2	562616771336652032		HD	12927		GC	2585
DM	BD+78 71		BD	BD+79 63		Distance	140.85		Distance ly	459.45

discov_num	notes	refcode
S 405	STTA 22. A is a Delta Scuti-type variable and spectroscopic
	binary, P = 4.12d. B is BD+78@71.
	AB: H 5 84.	MEv2010

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

idgroup	discov	author
1	S	South, J.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
02128+7941	S 405	AB	2002	23	277	55.1	6.47	7.15	A5III	N D	021249.98+794129.3
02128+7941	S 405	AB	2003	26	277	55.6	6.47	7.15	A5III	N D	021249.98+794129.3
02128+7941	S 405	AB	2012	26	277	55.3	6.47	7.15	A5III	N D	021249.98+794129.3
02128+7941	S 405	AB	2015	27	277	55.5	6.47	7.15	A5III	N	021249.98+794129.3
02128+7941	S 405	AB	2016	28	278	55.6	6.47	7.15	A5III	N	021249.98+794129.3
02128+7941	S 405	AB	2017	30	277	55.6	6.47	7.15	A5III	N	021249.98+794129.3
02128+7941	S 405	AB	2018	31	278	55.6	6.47	7.15	A5III	N	021249.98+794129.3
02128+7941	S 405	AB	2019	33	278	55.7	6.47	7.15	A5III	N	021249.98+794129.3

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	22/10/07	daedalus1	mean difficulty	separated	278		Seeing: Pickering 8, excellent. Measure: theta 278, rho 56.25 +/- 0.097. Very bright white stars. Beautiful! Primary noticeably brighter.

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