08539+0149 A  2554

 
 
08H 53M 51.95S +01 49' 28.0" P.A. 27.3 SEP 0.13 MAG 7.44,9.64 SP F0 DIST. 67.61 PC (220.54 L.Y.)
 
 
Coord 2000
08539+0149
Discov num
A  2554
Comp
Coord arcsec 2000
08 53 51.95 +01 49 28.0
Date first
1913
Date last
2014
Obs
19
Pa first
323
Pa last
70
P.A. Now (θ)
27.3°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.13"
Mag pri
7.44
Mag sec
9.64
delta mag (ΔM)
2.2
Spectral class
F0 (yellow-white)
Pri motion ra
+010
Sec motion ra
Pri motion dec
-040
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
HIP
43676
Tycho2
0213-00019-1
HD
76050
ADS
7074
BD
BD+02 2088
Distance
67.61
Distance ly
220.54
last precise pa
70
last precise sep
0.197
 
 
ORBITAL ELEMENTS
 
 
Period (P)43.86y± 0.8 Periastron (T)2021.18y± 0.3 Semi-major axis (a)0.21a± 0.005
Eccentricity (e)0.502± 0.03 Inclination (i)162.4°± 11.4 Longitude of periastron (ω)339.7°± 17.3
Node (Ω)292.4°± 16.7 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.314 129.5
2001 0.313 126.5
2002 0.311 123.5
2003 0.308 120.3
2004 0.304 117.2
2005 0.299 113.9
2006 0.293 110.5
2007 0.286 106.9
2008 0.278 103.2
2009 0.268 99.2
2010 0.257 94.9
2011 0.245 90.1
2012 0.232 84.9
2013 0.217 79.0
2014 0.202 72.2
2015 0.185 64.1
2016 0.167 54.5
2017 0.149 42.5
2018 0.132 27.3
2019 0.117 7.9
2020 0.107 343.9
2021 0.104 316.8
2022 0.107 289.8
2023 0.116 265.8
2024 0.129 245.8
2025 0.144 229.7
2026 0.159 216.7
2027 0.175 206.0
2028 0.191 197.1
2029 0.206 189.5
2030 0.220 182.9

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