01131+2942 A  1260AB

Coord 2000	01131+2942		Discov num	A  1260		Comp	AB		Coord arcsec 2000	01 13 08.90 +29 41 59.1
Date first	1905		Date last	2009		Obs	22
Pa first	255		Pa last	60		P.A. Now (θ)	67.6°
Sep first	0.2		Sep last	0.3		Sep. Now (ρ)	0.17"
Mag pri	9.19		Mag sec	9.40		delta mag (ΔM)	0.21		Spectral class	G0 (yellow)
Pri motion ra	-018		Sec motion ra
Pri motion dec	-030		Sec motion dec
Notes	N O (See Notes, Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		74562	01131+2942	A 1260	AB	1905	2009	22	68	0.2	9.19	9.40	0.21	Y	<===
Show		74562	01131+2942	GRV 76	AC	1898	2015	10	170	61.6	9.19	11.00	1.81

Triple system
3 visible stars in this system

Precise pa	59.5		Precise sep	0.26		Constellation	Pisces		SAO	74562
Tycho2	1753-00396-1		Gaia DR2	6231138560		HD	7255		ADS	993
last precise pa	59.5		last precise sep	0.26

Period (P)	137.17y		Periastron (T)	2029.43y		Semi-major axis (a)	0.288a
Eccentricity (e)	0.489		Inclination (i)	78.1°		Longitude of periastron (ω)	274.29°
Node (Ω)	242.2°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.262 53.4 2001 0.263 54.0 2002 0.263 54.6 2003 0.264 55.1 2004 0.264 55.7 2005 0.263 56.3 2006 0.262 56.8 2007 0.260 57.4 2008 0.258 58.0 2009 0.255 58.6 2010 0.252 59.2 2011 0.248 59.8 2012 0.243 60.5 2013 0.237 61.1 2014 0.231 61.8 2015 0.223 62.6 2016 0.215 63.4 2017 0.206 64.3 2018 0.195 65.3 2019 0.184 66.4 2020 0.171 67.6 2021 0.157 69.1 2022 0.142 70.8 2023 0.125 73.0 2024 0.108 75.9 2025 0.090 80.0 2026 0.071 86.1 2027 0.052 96.7 2028 0.037 117.3 2029 0.030 154.7 2030 0.038 190.6 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
01131+2942	A 1260	AB	1995	20	49	0.2	9.60	9.80	G0	NO	011308.90+294159.1
01131+2942	A 1260	AB	2007	21	54	0.3	9.60	9.80	G0	NO	011308.90+294159.1
01131+2942	A 1260	AB	2009	22	60	0.3	9.19	9.40	G0	NO	011308.90+294159.1

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