01297+2250 A  1910AB

Coord 2000	01297+2250		Discov num	A  1910		Comp	AB		Coord arcsec 2000	01 29 41.17 +22 49 34.4
Date first	1908		Date last	2019		Obs	114
Pa first	127		Pa last	176		P.A. Now (θ)	171.3°
Sep first	0.1		Sep last	0.2		Sep. Now (ρ)	0.22"
Mag pri	7.30		Mag sec	7.90		delta mag (ΔM)	0.6		Spectral class	A2V (white)
Pri motion ra	+010		Sec motion ra
Pri motion dec	-018		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		74751	01297+2250	A 1910	AB	1908	2019	114	171	0.2	7.30	7.90	0.60	Y	<===
Show		74751	01297+2250	A 1910	AB,C	1917	2013	7	352	18.8	6.77	12.71	5.94

Triple system
4 visible stars in this system

Precise pa	176.2		Precise sep	0.19		Constellation	Pisces		SAO	74751
HIP	6966		Tycho2	1749-01315-1		Gaia DR2	4823619200		HD	9071
ADS	1183		BD	BD+22 236		Distance	164.2		Distance ly	535.62
last precise pa	176.2		last precise sep	0.19

Period (P)	70.7y	± 1.2	Periastron (T)	1985.037y	± 0.072	Semi-major axis (a)	0.1904a	± 0.002
Eccentricity (e)	0.7802	± 0.0054	Inclination (i)	119.7°	± 1.1	Longitude of periastron (ω)	119.6°	± 1.2
Node (Ω)	129.8°	± 1	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label rho theta 2000 0.128 209.9 2001 0.134 206.5 2002 0.139 203.5 2003 0.145 200.6 2004 0.150 198.0 2005 0.156 195.5 2006 0.161 193.3 2007 0.166 191.1 2008 0.171 189.1 2009 0.176 187.2 2010 0.181 185.4 2011 0.186 183.7 2012 0.190 182.1 2013 0.195 180.6 2014 0.199 179.1 2015 0.203 177.7 2016 0.207 176.3 2017 0.211 175.0 2018 0.215 173.8 2019 0.218 172.5 2020 0.221 171.3 2021 0.224 170.2 2022 0.227 169.1 2023 0.229 168.0 2024 0.231 166.9 2025 0.233 165.8 2026 0.235 164.8 2027 0.236 163.7 2028 0.238 162.7 2029 0.238 161.7 2030 0.239 160.7 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
01297+2250	A 1910	AB	2005	98	195	0.2	7.50	7.70	A2V	NOD	012941.17+224934.4
01297+2250	A 1910	AB	2007	100	192	0.2	7.50	7.70	A2V	NOD	012941.17+224934.4
01297+2250	A 1910	AB	2009	102	183	0.2	7.50	7.70	A2V	NOD	012941.17+224934.4
01297+2250	A 1910	AB	2010	104	187	0.2	7.30	7.90	A2V	NOD	012941.17+224934.4
01297+2250	A 1910	AB	2013	107	183	0.2	7.30	7.90	A2V	NOD	012941.17+224934.4
01297+2250	A 1910	AB	2019	114	176	0.2	7.30	7.90	A2V	NO	012941.17+224934.4

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