07211+6740 JNN 55 BC

Coord 2000	07211+6740		Discov num	JNN  55		Comp	BC		Coord arcsec 2000	07 21 08.90 +67 39 59.3
Date first	2008		Date last	2018		Obs	5
Pa first	59		Pa last	25.7		P.A. Now (θ)	25.7°
Sep first	0.2		Sep last	0.116		Sep. Now (ρ)	0.116"
Mag pri	13.50		Mag sec	15.80		delta mag (ΔM)	2.3		Spectral class	M3V+M5 (red/red)
Pri motion ra	-067		Sec motion ra
Pri motion dec	+076		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		14155	07 21 07 +67 39 43	RED 22 AB	2016	10	38	20.7	8.40	13.45	5.05
Show			07 21 09 +67 39 59	JNN 55 BC	2018	5	26	0.1	13.50	15.80	2.30	Y	<===

Triple system
3 estimated visually detectable stars in this system

Constellation

Camelopardalis

Gaia DR2

1108183132386895872

Period (P)	13.97y	± 1.23	Periastron (T)	2013.53y	± 0.9	Semi-major axis (a)	0.178a	± 0.04
Eccentricity (e)	0.78		Inclination (i)	67.9°	± 7.8	Longitude of periastron (ω)	106.7°	± 7.4
Node (Ω)	94.5°	± 6.5	Notes			Reference	Tok2019e
Equinox	2000		Last observation	2018		Grade	4	(1=Definitive, 9=Indet.)

label theta rho 2000 281.9 0.069 2001 310.0 0.090 2002 332.9 0.093 2003 354.1 0.098 2004 12.1 0.109 2005 26.5 0.123 2006 37.9 0.138 2007 47.0 0.152 2008 54.6 0.165 2009 61.4 0.173 2010 67.7 0.175 2011 74.2 0.168 2012 82.0 0.144 2013 97.0 0.080 2014 283.1 0.070 2015 310.7 0.090 2016 333.5 0.093 2017 354.7 0.099 2018 12.6 0.109 2019 26.9 0.123 2020 38.2 0.138 2021 47.2 0.153 2022 54.9 0.165 2023 61.6 0.173 2024 67.9 0.175 2025 74.4 0.167 2026 82.3 0.143 2027 97.9 0.077 2028 284.2 0.072 2029 311.4 0.090 2030 334.2 0.093		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
RED 22	M3 star is ~21" from K0 dwarf HD 56168 = HIP 35628 = 2MASS
	J07210672+6739425. The Hipparcos distance for the M dwarf 27pc, the
	very different proper motions suggest the stars appear unrelated.	Red2007a
JNN 55	BC: In addition to the close binarity discovered in the AstraLux data,
	there is a star at 21" separation (HIP 35628), but due to its very
	different proper motion, it is likely physically unrelated to the	Red2007a
	2MASS J07210894+6739590 system (Reid et al. 2007).	Jnn2012

refcode	metd	author	reference
Jnn2012	Cl j	Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S.,	2012ApJ...754...44J
Jnn2012	+E2	Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012		ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b)	2014ApJS..214...17J
Red2007a	E2 -	Reid, I.N., Cruz, K.L., & Allen, P.	2007AJ....133.2825R
Red2007a		AJ 133, 2825, 2007
Red2007a		(coarse separations replaced with measures extracted from the 2MASS Catalog)
Tok2019e	St j	Tokovinin, A., Everett, M.E., Horch, E.P., Torres, G. & Latham, D.W.	2019AJ....158..167T
Tok2019e	+orb	AJ 158, 167, 2019

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
07211+6740	JNN 55	BC	2009	2	66	0.2	13.50	15.80	M3 M5		072108.90+673959.3
07211+6740	JNN 55	BC	2011	3	80	0.1	13.50	15.80	M3V+M5	NV	072108.90+673959.3
07211+6740	JNN 55	BC	2018	5	26	0.1	13.50	15.80	M3V+M5	NOVU	072108.90+673959.3

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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