22016+4921 ABH 156 AI

Coord 2000	22016+4921		Discov num	ABH 156		Comp	AI		Coord arcsec 2000	22 01 33.94 +49 21 08.7
Date first	1987		Date last	2015		Obs	5
Pa first	57		Pa last	56.2		P.A. Now (θ)	56.2°
Sep first	74.6		Sep last	72.759		Sep. Now (ρ)	72.759"
Mag pri	9.55		Mag sec	13.10		delta mag (ΔM)	3.55		Spectral class	A3Vp (white)
Pri motion ra	+043		Sec motion ra	-004
Pri motion dec	+026		Sec motion dec	-002
Notes	U (Proper motion indicates non-physical)

rPM=1.089 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			22 01 34 +49 21 09	ES 831 AB	2013	2	140	2.7	9.55	13.20	3.65
Show			22 01 34 +49 21 09	ES 831 AC	2016	17	310	20.5	9.55	10.62	1.07
Show			22 01 34 +49 21 09	ES 831 AD	2015	11	26	13.8	9.55	11.90	2.35
Show			22 01 34 +49 21 09	ES 831 AE	2015	10	70	16.0	9.55	13.64	4.09
Show			22 01 34 +49 21 09	ABH 156 AF	2015	6	256	49.2	9.55	12.57	3.02
Show			22 01 34 +49 21 09	ABH 156 AG	2015	5	309	82.0	9.55	13.45	3.90
Show			22 01 34 +49 21 09	ABH 156 AH	2009	4	319	79.4	9.55	15.30	5.75
Show			22 01 34 +49 21 09	ABH 156 AI	2015	5	56	72.8	9.55	13.10	3.55		<===
Show			22 01 34 +49 21 09	ABH 156 AJ	2015	5	104	59.4	9.55	13.99	4.44
Show			22 01 34 +49 21 09	ABH 156 AK	2015	5	98	95.9	9.55	13.53	3.98
Show			22 01 34 +49 21 09	ABH 156 AL	2015	5	298	44.9	9.55	14.40	4.85
Show			22 01 34 +49 21 09	ES 831 AM	2015	8	153	15.5	9.55	12.90	3.35

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

Constellation

Cygnus

Gaia DR2

1976822508328379648

discov_num	notes	refcode
ES 831	AD: Rectilinear solution by Hartkopf & Mason (2015).	WSI2015
	AE: Rectilinear solution by Hurowitz et al. (2014).	USN2014b

refcode	metd	author	reference
USN2014b	lin -	Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D.	2014IAUDS.183....1H
USN2014b		Inf. Circ. 183, 1, 2014
WSI2015	Cu j	Hartkopf, W.I. & Mason, B.D.	2015AJ....150..130H
WSI2015	+orb	AJ 150, 136, 2015
WSI2015	+lin

idgroup	discov	author
1	ABH	Abt, H.A.
29	ES	Espin, T.E.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
22016+4921	ABH 156	AI	1999	2	56	73.6	9.55	13.10	A3Vp	D	220133.94+492108.7
22016+4921	ABH 156	AI	2009	3	56	73.0	9.55	13.10	A3Vp	D	220133.94+492108.7
22016+4921	ABH 156	AI	2015	5	56	72.8	9.55	13.10	A3Vp	U	220133.94+492108.7

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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

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