22280+5742 KR 60 AB (DO Cep)

Coord 2000	22280+5742		Discov num	KR   60		Comp	AB		Coord arcsec 2000	22 27 59.20 +57 41 43.8
Date first	1890		Date last	2020		Obs	317
Pa first	179		Pa last	206.5		P.A. Now (θ)	188.7°
Sep first	2.3		Sep last	2.052		Sep. Now (ρ)	2.364"
Mag pri	9.93		Mag sec	11.41		delta mag (ΔM)	1.48		Spectral class	M3.5+M4.5 (red/red)
Pri motion ra	-806		Sec motion ra	-713
Pri motion dec	-399		Sec motion dec	-321
Notes	N O (See Notes, Orbital solution)

rPM=0.135 (< 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	DO Cep		22 27 59 +57 41 44	KR 60 AB	2020	317	207	2.1	9.93	11.41	1.48	Y	<===
Show			22 27 59 +57 41 44	KR 60 AC	2016	83	62	139.8	9.93	10.53	0.60
Show			22 27 59 +57 41 44	KR 60 AD	2016	10	56	119.3	9.93	14.30	4.37
Show			22 27 59 +57 41 44	KR 60 AE	2016	17	77	163.0	9.93	13.33	3.40
Show			22 27 59 +57 41 44	KR 60 AF	2016	16	46	71.9	9.93	14.43	4.50
Show			22 27 59 +57 41 44	KR 60 AG	2016	6	114	68.4	9.93	15.14	5.21
Show			22 27 59 +57 41 44	KR 60 AH	2016	8	267	50.2	9.93	13.02	3.09
Show			22 27 59 +57 41 44	KR 60 AI	2016	18	119	238.2	9.93	8.31	1.62
Show			22 27 59 +57 41 44	HEL 4 AJ	2016	10	113	32.5	9.93	15.70	5.77
Show			22 27 59 +57 41 44	HZE 5 AK	2006	1	0	7.2	4.78	16.00	11.22
Show			22 27 59 +57 41 44	FYM 118 AL	2016	5	13	107.0	9.93	15.44	5.51
Show			22 27 59 +57 41 44	FYM 118 AM	2016	5	356	78.4	9.93	15.60	5.67
Show			22 27 59 +57 41 44	FYM 118 AO	2016	5	135	83.0	9.93	15.17	5.24
Show			22 27 59 +57 41 44	FYM 118 AR	2016	5	113	113.7	9.93	15.20	5.27
Show			22 27 59 +57 41 44	FYM 118 AS	2016	5	264	13.2	9.93	15.70	5.77
Show			22 27 59 +57 41 44	FYM 118 AU	2016	5	103	137.6	9.93	15.20	5.27
Show			22 27 60 +57 41 44	KR 60 BC	2016	60	62	141.2	11.41	10.53	0.88
Show			22 27 60 +57 41 44	HEL 4 BJ	2016	7	112	33.9	11.41	15.70	4.29
Show			22 28 13 +57 42 44	FYM 118 CD	2016	8	272	24.5	10.53	14.30	3.77
Show			22 28 13 +57 42 44	KR 60 CE	2016	19	130	45.9	10.53	13.33	2.80	Y
Show			22 28 13 +57 42 44	FYM 118 CN	2016	9	52	42.1	10.53	14.92	4.39
Show			22 28 13 +57 42 44	FYM 118 CP	2016	9	320	46.5	10.53	14.79	4.26
Show			22 28 18 +57 42 15	FYM 118 EQ	2016	9	206	14.2	13.33	15.70	2.37

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

Var name	DO Cep		Constellation	Cepheus		HIP	110893		Tycho2	3991-00092-1
HD	239960		ADS	15972		GL	Gl 860A		BD	BD+56 2783
Distance	4		Distance ly	13.05

Period (P)	44.5814y	± 0.0345	Periastron (T)	1970.2342y	± 0.0389	Semi-major axis (a)	2.40113a	± 0.01042
Eccentricity (e)	0.40847	± 0.00223	Inclination (i)	165.701°	± 1.277	Longitude of periastron (ω)	207.481°	± 5.577
Node (Ω)	150.665°	± 5.42	Notes	n		Reference	Izm2019
Equinox			Last observation	2013		Grade	1	(1=Definitive, 9=Indet.)

label theta rho 2000 94.6 3.039 2001 90.0 2.954 2002 85.2 2.861 2003 79.9 2.758 2004 74.3 2.647 2005 68.2 2.528 2006 61.4 2.402 2007 53.8 2.269 2008 45.3 2.132 2009 35.6 1.994 2010 24.5 1.856 2011 11.6 1.725 2012 356.7 1.605 2013 339.6 1.506 2014 320.5 1.437 2015 300.1 1.409 2016 279.6 1.431 2017 260.3 1.500 2018 243.2 1.611 2019 228.5 1.748 2020 216.1 1.900 2021 205.6 2.057 2022 196.5 2.213 2023 188.7 2.364 2024 181.7 2.505 2025 175.5 2.638 2026 169.8 2.759 2027 164.6 2.869 2028 159.8 2.968 2029 155.3 3.056 2030 151.0 3.132		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

discov_num	notes	refcode
KR 60	B is the flare star DO Cep, which is fairly active with flares of small
	to moderate amplitudes.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	AC, AE, AF, and AI: Optical pair, based on study of relative motion of
	the components using the method of apparent motion parameters.	Kiy2008
	AB: Malkov et al. (2012) derive dynamical, photometric, and
	spectroscopic masses 0.43 +/- 0.06, 0.42, and 0.56 Msun, respectively.	Mlk2012
HZE 5	Heinze et al. (2010) determine the K component is a background object.	Hze2010
FYM 118	The EQ pair was initially listed incorrectly as CQ. The CD pair was
	initially listed incorrectly as a new CT pair.	FyM2014b
KR 60	AD, AG: Rectilinear solutions by Mason & Hartkopf (2016).	Msn2016a
	AF: Rectilinear solution by Hurowitz et al. (2014).	USN2014b
HEL 4	AJ: Rectilinear solution by Mason & Hartkopf (2016).	Msn2016a
FYM 118	AM, AO, AS: Rectilinear solutions by Mason & Hartkopf (2016).	Msn2016a
	CE: Despite having an orbit, an optical pair based on parallax.	Mlk2022

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
FyM2014b	C -	Fay, M.	.
FyM2014b		private communication
Hze2010	A j	Heinze, A.N., Hinz, P.M., Sivanandam, S., Kenworthy, M., Meyer, M., & Miller, D.	2010ApJ...714.1551H
Hze2010		ApJ 714, 1551, 2010
Izm2019	orb u	Izmailov, I.S.	2019AstL...45...30I
Izm2019		Ast. Lett. 45, 30, 2019
Izm2019		(Orbital elements from weighted solutions used when available (Table 2),
Izm2019		unweighted elements (Table 1) used for remaining 29 systems.)
Kiy2008	-	Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S.	2008SvAL...32..405K
Kiy2008		SvAL 34, 405, 2008
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Mlk2022	not -	Chulkov, D. & Malkov, O.	2022MNRAS.517.2925C
Mlk2022		MNRAS 517, 2925, 2022
Msn2016a	lin -	Mason, B.D. & Hartkopf, W.I.	2016IAUDS.189....1M
Msn2016a		Inf. Circ. 189, 1, 2016
USN2014b	lin -	Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D.	2014IAUDS.183....1H
USN2014b		Inf. Circ. 183, 1, 2014

idgroup	discov	author
1	HEL	Helminiak, K., Konacki, M., Kulkarni, S.R., & Eisner, J.
4	HEL	Helminiak, K.G., Konacki, M., Muterspaugh, M.W., Browne, S.E., Howard, A.W., &
4	HEL	Kulkarni, S.R.
5	HEL	Helminiak, K.G., Kuzuhara, M., Mede, K., Brandt, T.D., Kandori, R., Suenaga, T.,
5	HEL	Kusakabe, N., Narita, N., Carson, J., Currie, T., Kudo, T., Hashimoto, J., et al.
6	KR	Kruger, A. (from additional DD list)

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
22280+5742	KR 60	AB	2007	268	48	2.2	9.93	11.41	M3.5+M4.5	NOD	222800.42+574149.3
22280+5742	KR 60	AB	2008	270	42	2.1	9.93	11.41	M3.5+M4.5	NOD	222800.42+574149.3
22280+5742	KR 60	AB	2009	276	29	1.8	9.93	11.41	M3.5+M4.5	NOD	222800.42+574149.3
22280+5742	KR 60	AB	2010	283	17	1.6	9.93	11.41	M3.5+M4.5	NOD	222800.42+574149.3
22280+5742	KR 60	AB	2013	286	329	1.5	9.93	11.41	M3.5 M4.5	NOD	222759.20+574143.8
22280+5742	KR 60	AB	2015	289	288	1.4	9.93	11.41	M3.5+M4.5	NO	222759.20+574143.8
22280+5742	KR 60	AB	2016	291	266	1.5	9.93	11.41	M3.5+M4.5	NO	222759.20+574143.8
22280+5742	KR 60	AB	2020	295	206	2.1	9.93	11.41	M3.5+M4.5	NO	222759.20+574143.8

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	20/10/25	Adam Long	difficut	separated	235	interesting but to observe in better conditions	Seeing not great, transparency good. A dark background and lower mag/ bigger exit pupil are useful tools for this pair.

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