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	2018	Obs	95
Pa first	100	Pa last	114	P.A. Now (θ)	106.5°
Sep first	0.5	Sep last	0.6	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.

01213+1132 SYSTEM COMPONENTS

Show

name

SAO

coord_2000

discov#

comp

first

last

obs

sep

mag1

mag2

d_mag

orb

current

Show

01213+1132

BU 4

1872

2018

106

0.6

7.12

8.86

1.74

<===

Show

01213+1132

BU 4

1898

2015

250

29.3

7.12

13.60

6.48

Triple system
3 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	113.8	Precise sep	0.639	Constellation	Pisces	SAO	92388
HIP	6334	Tycho2	0616-00939-1	Gaia DR2	99560585344	HD	8187
ADS	1097	BD	BD+10 168	Distance	206.61	Distance ly	673.96
last precise pa	113.8	last precise sep	0.639

ORBITAL ELEMENTS

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

WDS HISTORIC DATA

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

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