01213+1132 BU    4AB

Coord 2000	01213+1132		Discov num	BU    4		Comp	AB		Coord arcsec 2000	01 21 19.23 +11 32 12.3
Date first	1872		Date last	2015		Obs	92
Pa first	100		Pa last	117		P.A. Now (θ)	106.5°
Sep first	0.5		Sep last	0.5		Sep. Now (ρ)	0.6"
Mag pri	7.12		Mag sec	8.86		delta mag (ΔM)	1.74		Spectral class	F1III (yellow-white)
Pri motion ra	+060		Sec motion ra	+060
Pri motion dec	+001		Sec motion dec	+001
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		92388	01213+1132	BU 4	AB	1872	2015	92	106	0.6	7.12	8.86	1.74	Y	<===
Show		92388	01213+1132	BU 4	AC	1898	2015	8	250	29.3	7.12	13.60	6.48

Triple system
3 visible stars in this system

Precise pa	116.9		Precise sep	0.54		Constellation	Pisces		SAO	92388
HIP	6334		Tycho2	0616-00939-1		Gaia DR2	2586478199560585344		HD	8187
ADS	1097		BD	BD+10 168		Distance	206.61		Distance ly	673.96
last precise pa	116.9		last precise sep	0.54

Period (P)	291.05y		Periastron (T)	1942.93y		Semi-major axis (a)	0.43a
Eccentricity (e)	0.89		Inclination (i)	141°		Longitude of periastron (ω)	242.8°
Node (Ω)	149.8°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2008

label rho theta 2000 0.535 111.2 2001 0.539 110.9 2002 0.543 110.7 2003 0.547 110.4 2004 0.551 110.1 2005 0.555 109.9 2006 0.558 109.6 2007 0.562 109.3 2008 0.565 109.1 2009 0.569 108.8 2010 0.572 108.6 2011 0.575 108.3 2012 0.579 108.1 2013 0.582 107.8 2014 0.585 107.6 2015 0.588 107.4 2016 0.591 107.1 2017 0.594 106.9 2018 0.597 106.7 2019 0.600 106.5 2020 0.602 106.2 2021 0.605 106.0 2022 0.608 105.8 2023 0.610 105.6 2024 0.613 105.3 2025 0.615 105.1 2026 0.618 104.9 2027 0.620 104.7 2028 0.622 104.5 2029 0.624 104.3 2030 0.627 104.1 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
01213+1132	BU 4	AB	2005	86	109	0.6	7.12	8.86	F1III	NOD	012119.23+113212.3
01213+1132	BU 4	AB	2008	87	110	0.6	7.12	8.86	F1III	NOD	012119.23+113212.3
01213+1132	BU 4	AB	2015	92	117	0.5	7.12	8.86	F1III	NO	012119.23+113212.3

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