Coord 2000	00028+0208	Discov num	BU 281	Comp	AB	Coord arcsec 2000	00 02 47.14 +02 07 49.4
Date first	1877	Date last	2015	Obs	68
Pa first	217	Pa last	160	P.A. Now (θ)	159.2°
Sep first	1.1	Sep last	1.6	Sep. Now (ρ)	1.55"
Mag pri	7.40	Mag sec	9.36	delta mag (ΔM)	1.96	Spectral class	F2V (yellow-white)
Pri motion ra	+062	Sec motion ra	+062
Pri motion dec	-094	Sec motion dec	-094
Notes	N O (See Notes, Orbital solution)

This double is physical.

00028+0208 SYSTEM COMPONENTS

Show

name

SAO

coord_2000

discov#

comp

first

last

obs

sep

mag1

mag2

d_mag

orb

current

Show

00028+0208

BU 281

1877

2015

159

1.6

7.40

9.36

1.96

<===

Show

00028+0208

HJ 998

1877

2016

329

46.3

7.40

12.38

4.98

Triple system
3 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	159.7	Precise sep	1.579	Cdsa2 id	BU 281 AB	Constellation	Pisces
HIP	223	Tycho2	0001-00903-1	HD	225028	ADS	9
BD	BD+01 4820	Ra deg	0.046427777777777776	De deg	2.130388888888889	Distance	42.63
Distance ly	139.06	last precise pa	159.7	last precise sep	1.579

ORBITAL ELEMENTS

Period (P)	1117y	Periastron (T)	2077.5y	Semi-major axis (a)	3.14a
Eccentricity (e)	0.639	Inclination (i)	108.5°	Longitude of periastron (ω)	55.7°
Node (Ω)	149.9°	Note		Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000	Last observation	2014

label	rho	theta
2000	1.572	164.9
2001	1.573	164.6
2002	1.573	164.3
2003	1.573	164.0
2004	1.573	163.6
2005	1.573	163.3
2006	1.573	163.0
2007	1.572	162.7
2008	1.571	162.4
2009	1.570	162.1
2010	1.569	161.8
2011	1.568	161.4
2012	1.566	161.1
2013	1.564	160.8
2014	1.562	160.5
2015	1.560	160.2
2016	1.558	159.9
2017	1.555	159.5
2018	1.552	159.2
2019	1.549	158.9
2020	1.546	158.6
2021	1.542	158.2
2022	1.538	157.9
2023	1.534	157.6
2024	1.529	157.3
2025	1.524	156.9
2026	1.519	156.6
2027	1.514	156.2
2028	1.508	155.9
2029	1.502	155.6
2030	1.496	155.2

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
00028+0208	BU 281	AB	2006	59	163	1.6	7.40	9.36	F2V	D	000247.14+020749.4
00028+0208	BU 281	AB	2008	64	163	1.6	7.40	9.36	F2V	D	000247.14+020749.4
00028+0208	BU 281	AB	2012	65	162	1.6	7.40	9.36	F2V	N D	000247.14+020749.4
00028+0208	BU 281	AB	2014	67	160	1.6	7.40	9.36	F2V	NU	000247.14+020749.4
00028+0208	BU 281	AB	2015	68	160	1.6	7.40	9.36	F2V	NO	000247.14+020749.4

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