02145+6631 MCA 6 (55 Cas)

02^h 14^m 29.10^s +66° 31' 28.0" P.A. 188.00 sep 0.1 mag 6.40,7.60 Sp B9V+... dist. 218.82 pc (713.79 l.y.)

Coord 2000	02145+6631		Discov num	MCA 6		Comp			Coord arcsec 2000	02 14 29.10 +66 31 28.0
Date first	1980		Date last	2020		Obs	43
Pa first	10		Pa last	187.9		P.A. Now (θ)	209.4°
Sep first	0.1		Sep last	0.08		Sep. Now (ρ)	0.072"
Mag pri	6.40		Mag sec	7.60		delta mag (ΔM)	1.2		Spectral class	B9V+... (blue-white)
Pri motion ra	-006		Sec motion ra
Pri motion dec	-006		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	55 Cas		Var name	NSV753 Cas		Constellation	Cassiopeia		SAO	12180
HIP	10438		Tycho2	4045-00788-1		Gaia DR2	520166963851585536		HD	13475
HR	640		GC	2661		BD	BD+65 239		Flamsteed	55 Cassiopeiae
Flamsteed name	55 Cas		FK5	76		Distance	218.82		Distance ly	713.79

ORBITAL ELEMENTS

Period (P)	40y	± 0.1	Periastron (T)	2029.4y	± 0.1	Semi-major axis (a)	82.3m	± 0.3
Eccentricity (e)	0.362	± 0.003	Inclination (i)	24°	± 1	Longitude of periastron (ω)	223.3°	± 4.7
Node (Ω)	83.1°	± 4.5	Notes	n		Reference	Mit2021
Equinox			Last observation	2020		Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	79.1	0.095
2001	84.7	0.098
2002	89.9	0.101
2003	94.9	0.104
2004	99.6	0.105
2005	104.2	0.107
2006	108.7	0.108
2007	113.2	0.108
2008	117.6	0.108
2009	122.0	0.108
2010	126.5	0.107
2011	131.1	0.106
2012	135.8	0.104
2013	140.6	0.103
2014	145.7	0.100
2015	151.0	0.098
2016	156.5	0.095
2017	162.5	0.092
2018	168.8	0.089
2019	175.6	0.086
2020	182.9	0.082
2021	190.9	0.079
2022	199.7	0.075
2023	209.4	0.072
2024	220.0	0.068
2025	231.9	0.064
2026	245.2	0.061
2027	260.1	0.057
2028	276.9	0.054
2029	295.8	0.051
2030	316.3	0.050

grafico orbita

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

wds02145%2B6631c.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic