01277+0521 BU 1164AB

Coord 2000	01277+0521		Discov num	BU 1164		Comp	AB		Coord arcsec 2000	01 27 39.81 +05 21 11.2
Date first	1890		Date last	2015		Obs	85
Pa first	168		Pa last	171		P.A. Now (θ)	168.7°
Sep first	0.4		Sep last	0.3		Sep. Now (ρ)	0.33"
Mag pri	7.56		Mag sec	8.41		delta mag (ΔM)	0.85		Spectral class	G0V (yellow)
Pri motion ra	-018		Sec motion ra
Pri motion dec	-131		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

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name

SAO

coord_2000

discov#

comp

first

last

obs

pa

sep

mag1

mag2

d_mag

orb

current

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95 Psc

01277+0521

BU 1164

AB

1890

2015

85

169

0.3

7.56

8.41

0.85

Y

<===

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01277+0521

BU 1164

AB,C

1910

2000

5

224

139.4

7.11

12.90

5.79

Triple system
4 visible stars in this system

Tycho2

2803-01109-1

last precise pa

171

last precise sep

0.271

Period (P)	63.73y		Periastron (T)	2008.19y		Semi-major axis (a)	0.291a
Eccentricity (e)	0.771		Inclination (i)	107.7°		Longitude of periastron (ω)	196°
Node (Ω)	163.9°		Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2008

label rho theta 2000 0.182 140.2 2001 0.155 136.9 2002 0.127 132.3 2003 0.099 124.9 2004 0.071 111.6 2005 0.049 83.9 2006 0.045 37.8 2007 0.061 3.8 2008 0.067 343.0 2009 0.039 310.1 2010 0.039 221.2 2011 0.082 191.7 2012 0.125 182.7 2013 0.164 178.2 2014 0.200 175.4 2015 0.232 173.4 2016 0.261 171.8 2017 0.287 170.6 2018 0.312 169.6 2019 0.334 168.7 2020 0.354 167.9 2021 0.373 167.2 2022 0.390 166.6 2023 0.405 166.0 2024 0.419 165.4 2025 0.432 164.9 2026 0.444 164.4 2027 0.454 164.0 2028 0.463 163.5 2029 0.471 163.1 2030 0.478 162.7 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
01277+0521	BU 1164	AB	1999	82	142	0.2	7.56	8.41	G0V	NOD	012739.81+052111.2
01277+0521	BU 1164	AB	2008	83	322	0.0	7.56	8.41	G0V	NOD	012739.81+052111.2
01277+0521	BU 1164	AB	2012	85	177	0.2	7.56	8.41	G0V	NO	012739.81+052111.2
01277+0521	BU 1164	AB	2015	85	171	0.3	7.56	8.41	G0V	NO	012739.81+052111.2

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