01251+4537 A   939

Coord 2000	01251+4537		Discov num	A   939		Comp			Coord arcsec 2000	01 25 06.75 +45 36 31.0
Date first	1905		Date last	2010		Obs	37
Pa first	264		Pa last	195		P.A. Now (θ)	207.6°
Sep first	0.2		Sep last	0.2		Sep. Now (ρ)	0.21"
Mag pri	8.94		Mag sec	9.09		delta mag (ΔM)	0.15		Spectral class	F0 (yellow-white)
Pri motion ra	-017		Sec motion ra
Pri motion dec	-021		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	194.9		Precise sep	0.23		Constellation	Andromeda		SAO	37184
HIP	6633		Tycho2	3265-00290-1		Gaia DR2	397299013346796800		HD	8528
ADS	1126		BD	BD+44 296		Distance	180.18		Distance ly	587.75
last precise pa	194.9		last precise sep	0.23

Period (P)	145.64y		Periastron (T)	1962.5y		Semi-major axis (a)	0.185a
Eccentricity (e)	0.196		Inclination (i)	19.4°		Longitude of periastron (ω)	273.6°
Node (Ω)	143.5°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2010

label rho theta 2000 0.191 170.1 2001 0.192 172.2 2002 0.193 174.3 2003 0.194 176.4 2004 0.195 178.5 2005 0.196 180.5 2006 0.197 182.5 2007 0.198 184.5 2008 0.199 186.5 2009 0.199 188.5 2010 0.200 190.5 2011 0.201 192.4 2012 0.201 194.4 2013 0.202 196.3 2014 0.203 198.2 2015 0.203 200.1 2016 0.204 202.0 2017 0.204 203.9 2018 0.205 205.8 2019 0.205 207.6 2020 0.205 209.5 2021 0.206 211.3 2022 0.206 213.2 2023 0.206 215.0 2024 0.207 216.8 2025 0.207 218.7 2026 0.207 220.5 2027 0.208 222.3 2028 0.208 224.1 2029 0.208 225.9 2030 0.208 227.7 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
01251+4537	A 939		1992	35	147	0.2	8.94	9.09	F0	NO	012506.75+453631.0
01251+4537	A 939		2007	36	185	0.2	8.94	9.09	F0	NO	012506.75+453631.0
01251+4537	A 939		2010	38	195	0.2	8.94	9.09	F0	NO	012506.75+453631.0

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