01023+8153 KNT   1AB (Ups Cep)

Coord 2000	01023+8153		Discov num	KNT   1		Comp	AB		Coord arcsec 2000	01 02 18.34 +81 52 32.1
Date first	1881		Date last	2015		Obs	18
Pa first	62		Pa last	63		P.A. Now (θ)	63°
Sep first	13.8		Sep last	13.9		Sep. Now (ρ)	13.9"
Mag pri	6.90		Mag sec	11.83		delta mag (ΔM)	4.93		Spectral class	B8V+G8IV (blue-white/yellow)
Pri motion ra	+025		Sec motion ra	+026
Pri motion dec	-005		Sec motion dec	-005
Notes	N V (See Notes, Proper motion indicates physical)

Visually invisible, K-band or other infrared star rPM=0.038 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Ups Cep	168	01023+8153	KNT 1	AB	1881	2015	18	63	13.9	6.90	11.83	4.93		<===
Show		168	01023+8153	KNT 1	AC	1881	2015	13	315	24.3	6.90	12.20	5.30
Show		168	01023+8153	KNT 1	BC	1975	2015	10	290	31.6	11.83	12.20	0.37

Triple system
3 visible stars in this system

Precise pa	63.2		Precise sep	13.862		Name	Ups Cep		Var name	U Cep
Constellation	Cepheus		SAO	168		HIP	4843		Tycho2	4505-00519-1
Gaia DR2	7123439360		HD	5679		GC	1202		BD	BD+81 25
Bayer	Upsilon Cephei		Bayer name	Ups Cep		Distance	253.16		Distance ly	825.81

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01023+8153	KNT 1	AB	2000	8	63	13.9	6.90	11.83	B7V	N D	010218.34+815232.1
01023+8153	KNT 1	AB	2003	9	62	13.9	6.90	11.83	B7V	N D	010218.34+815232.1
01023+8153	KNT 1	AB	2010	15	65	13.6	6.90	11.83	B7V+G8III	NV	010218.34+815232.1
01023+8153	KNT 1	AB	2015	15	63	13.9	6.90	11.83	B7V+G8III	NV	010218.34+815232.1

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