03189-0101 BU 1177

 
 
03H 18M 52.91S -01 01' 08.9" P.A. 194.5 SEP 0.62 MAG 10.28,10.38 SP G5+G5 DIST. 73.58 PC (240.02 L.Y.)
 
 
Coord 2000
03189-0101
Discov num
BU 1177
Comp
Coord arcsec 2000
03 18 52.91 -01 01 08.9
Date first
1890
Date last
2015
Obs
38
Pa first
25
Pa last
195
P.A. Now (θ)
194.5°
Sep first
0.4
Sep last
0.6
Sep. Now (ρ)
0.62"
Mag pri
10.28
Mag sec
10.38
delta mag (ΔM)
0.1
Spectral class
G5+G5 (yellow/yellow)
Pri motion ra
+189
Sec motion ra
+189
Pri motion dec
+099
Sec motion dec
+099
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
HIP
15430
Tycho2
4708-00421-1
HD
20601
ADS
2464
BD
BD-01 473
Distance
73.58
Distance ly
240.02
last precise pa
195.3
last precise sep
0.619
 
 
ORBITAL ELEMENTS
 
 
Period (P)258.4y± 25 Periastron (T)1903.1y± 7.5 Semi-major axis (a)0.494a± 0.003
Eccentricity (e)0.268± 0.015 Inclination (i)120.2°± 3 Longitude of periastron (ω)16.3°± 20
Node (Ω)16.2°± 1 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.592 202.0
2001 0.595 201.5
2002 0.598 201.1
2003 0.600 200.6
2004 0.603 200.2
2005 0.605 199.7
2006 0.607 199.3
2007 0.609 198.8
2008 0.611 198.4
2009 0.612 197.9
2010 0.614 197.5
2011 0.615 197.1
2012 0.616 196.6
2013 0.617 196.2
2014 0.618 195.8
2015 0.619 195.3
2016 0.619 194.9
2017 0.620 194.5
2018 0.620 194.0
2019 0.620 193.6
2020 0.620 193.2
2021 0.620 192.7
2022 0.620 192.3
2023 0.619 191.9
2024 0.619 191.5
2025 0.618 191.0
2026 0.617 190.6
2027 0.616 190.2
2028 0.615 189.7
2029 0.613 189.3
2030 0.612 188.9

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic