00121+5337 BU 1026AB

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	2018		Obs	132
Pa first	330		Pa last	325		P.A. Now (θ)	326.3°
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.

Show

name

SAO

coord

wds_name

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

Show

21202

00 12 08 +53 37 26

BU 1026 AB

2018

132

326

0.4

7.25

8.46

1.21

Y

<===

Show

21202

00 12 08 +53 37 26

CHR 1 AC

2001

8

298

0.3

7.25

Triple system
3 visible stars in this system

Precise pa	324.7		Precise sep	0.35		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	324.7		last precise sep	0.35

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

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

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