03556-2613 HDS 495

 
 
03h 55m 36.30s -26 12' 54.1" P.A. 271 sep 0.2 mag 7.79,10.40 Sp K0III dist. 94.88 pc (309.5 l.y.)
 
 
Coord 2000
03556-2613
Discov num
HDS 495
Comp
Coord arcsec 2000
03 55 36.30 -26 12 54.1
Date first
1991
Date last
2015
Obs
7
Pa first
269
Pa last
271
P.A. Now (θ)
271°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
7.79
Mag sec
10.40
delta mag (ΔM)
2.61
Spectral class
K0III (yellow-orange)
Pri motion ra
-032
Sec motion ra
Pri motion dec
-018
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Eridanus
SAO
168961
HIP
18364
Tycho2
6458-01171-1
HD
24798
CD
CD-26 1479
CP
CP-26 435
Distance
94.88
Distance ly
309.5
last precise pa
270.9
last precise sep
0.179
 
 
ORBITAL ELEMENTS
 
 
Period (P)50y Periastron (T)1991.68y Semi-major axis (a)0.207a
Eccentricity (e)0.093 Inclination (i)130.6° Longitude of periastron (ω)313.5°
Node (Ω)230.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.190 215.4
2001 0.185 209.7
2002 0.180 203.7
2003 0.173 197.2
2004 0.166 190.3
2005 0.159 182.7
2006 0.153 174.4
2007 0.148 165.6
2008 0.144 156.2
2009 0.143 146.4
2010 0.144 136.7
2011 0.147 127.2
2012 0.152 118.3
2013 0.159 110.0
2014 0.166 102.4
2015 0.175 95.5
2016 0.183 89.3
2017 0.191 83.6
2018 0.199 78.3
2019 0.206 73.5
2020 0.212 68.9
2021 0.216 64.5
2022 0.219 60.3
2023 0.220 56.1
2024 0.220 52.0
2025 0.217 47.8
2026 0.214 43.5
2027 0.208 39.0
2028 0.201 34.2
2029 0.192 29.1
2030 0.182 23.3

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
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
03556-2613 HDS 495 1991 1 269 0.2 7.79 10.40 K0III 035536.30-261254.1
03556-2613 HDS 495 2014 2 277 0.2 7.79 10.40 K0III 035536.30-261254.1
03556-2613 HDS 495 2015 3 271 0.2 7.79 10.40 K0III 035536.30-261254.1

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