Coord 2000	00121+5337	Discov num	BU 1026	Comp	AB	Coord arcsec 2000	00 12 08.05 +53 37 26.1
Date first	1888	Date last	2016	Obs	126
Pa first	330	Pa last	330	P.A. Now (θ)	324°
Sep first	0.5	Sep last	0.4	Sep. Now (ρ)	0.35"
Mag pri	7.25	Mag sec	8.46	delta mag (ΔM)	1.21	Spectral class	A7Vn+F2V (white/yellow-white)
Pri motion ra	+039	Sec motion ra
Pri motion dec	-012	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

00121+5337 SYSTEM COMPONENTS

Show

name

SAO

coord_2000

discov#

comp

first

last

obs

sep

mag1

mag2

d_mag

orb

current

Show

21202

00121+5337

BU 1026

1888

2016

126

324

0.4

7.25

8.46

1.21

<===

Show

21202

00121+5337

CHR 1

1982

2001

298

0.3

7.25

Triple system
3 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	329.6	Precise sep	0.371	Constellation	Cassiopeia	SAO	21202
HIP	981	Tycho2	3652-01234-1	Gaia DR2	420017603641437824	HD	761
ADS	148	BD	BD+52 19	Distance	119.9	Distance ly	391.11
last precise pa	329.6	last precise sep	0.371

ORBITAL ELEMENTS

Period (P)	66.84y	± 0.17	Periastron (T)	1986.542y	± 0.029	Semi-major axis (a)	0.2514a	± 0.0055
Eccentricity (e)	0.8282	± 0.0058	Inclination (i)	42.77°	± 0.84	Longitude of periastron (ω)	255.2°	± 1.1
Node (Ω)	254.9°	± 1.2	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation

label	rho	theta
2000	0.286	299.4
2001	0.294	301.1
2002	0.301	302.7
2003	0.308	304.2
2004	0.314	305.6
2005	0.319	307.0
2006	0.324	308.4
2007	0.329	309.7
2008	0.333	311.0
2009	0.336	312.2
2010	0.339	313.5
2011	0.342	314.7
2012	0.344	315.9
2013	0.345	317.0
2014	0.347	318.2
2015	0.348	319.4
2016	0.348	320.5
2017	0.348	321.7
2018	0.348	322.8
2019	0.348	324.0
2020	0.347	325.1
2021	0.345	326.3
2022	0.344	327.5
2023	0.342	328.7
2024	0.339	329.9
2025	0.337	331.1
2026	0.334	332.4
2027	0.330	333.6
2028	0.326	334.9
2029	0.322	336.3
2030	0.318	337.6

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
00121+5337	BU 1026	AB	2007	106	309	0.3	7.25	8.46		NOD	001208.05+533726.1
00121+5337	BU 1026	AB	2008	112	311	0.3	7.25	8.46		NOD	001208.05+533726.1
00121+5337	BU 1026	AB	2010	113	313	0.3	7.25	8.46		NOD	001208.05+533726.1
00121+5337	BU 1026	AB	2014	118	319	0.3	7.25	8.46	A7Vn+F2V	NO	001208.05+533726.1
00121+5337	BU 1026	AB	2016	126	330	0.4	7.25	8.46	A7Vn+F2V	NO	001208.05+533726.1

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