00258+1025 HDS  57

 
 
00h 25m 49.78s +10 25' 24.1" P.A. 349.50 sep 0.1 mag 9.71,10.71 Sp G0 dist. 110.13 pc (359.24 l.y.)
 
 
Coord 2000
00258+1025
Discov num
HDS  57
Comp
Coord arcsec 2000
00 25 49.78 +10 25 24.1
Date first
1991
Date last
2020
Obs
13
Pa first
157
Pa last
353
P.A. Now (θ)
349.5°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.06"
Mag pri
9.71
Mag sec
10.71
delta mag (ΔM)
1
Spectral class
G0 (yellow)
Pri motion ra
+066
Sec motion ra
Pri motion dec
+049
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
353
Precise sep
0.062
Constellation
Hydra
SAO
91889
HIP
2035
Tycho2
0599-00603-1
Gaia DR2
2754101912605043584
HD
2157
BD
BD+09 41
Distance
110.13
Distance ly
359.24
last precise pa
353
last precise sep
0.062
 
 
ORBITAL ELEMENTS
 
 
Period (P)96.7y Periastron (T)2019.26y Semi-major axis (a)0.179a
Eccentricity (e)0.527 Inclination (i)131.8° Longitude of periastron (ω)47.4°
Node (Ω)52.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2021
label rho theta
2000 0.133 133.3
2001 0.130 129.4
2002 0.127 125.3
2003 0.125 121.0
2004 0.123 116.6
2005 0.121 112.1
2006 0.119 107.4
2007 0.117 102.5
2008 0.116 97.6
2009 0.114 92.5
2010 0.113 87.2
2011 0.111 81.8
2012 0.109 76.2
2013 0.106 70.3
2014 0.103 64.1
2015 0.098 57.4
2016 0.093 50.0
2017 0.087 41.7
2018 0.080 32.0
2019 0.073 20.4
2020 0.066 6.2
2021 0.062 349.5
2022 0.061 331.4
2023 0.064 314.0
2024 0.071 299.1
2025 0.080 287.2
2026 0.090 277.8
2027 0.101 270.4
2028 0.112 264.4
2029 0.122 259.4
2030 0.132 255.3


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



 
 


wds00258%2B1025a.png orbit plot
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
00258+1025 HDS 57 1991 1 157 0.2 9.71 10.71 G0 002549.78+102524.1
00258+1025 HDS 57 2007 3 99 0.1 9.71 10.71 G0 D 002549.78+102524.1
00258+1025 HDS 57 2008 4 95 0.1 9.71 10.71 G0 D 002549.78+102524.1
00258+1025 HDS 57 2015 5 52 0.1 9.71 10.71 G0 002549.78+102524.1
00258+1025 HDS 57 2017 10 37 0.1 9.71 10.71 G0 002549.78+102524.1
00258+1025 HDS 57 2018 11 21 0.1 9.71 10.71 G0 O 002549.78+102524.1
00258+1025 HDS 57 2019 12 14 0.1 9.71 10.71 G0 O 002549.78+102524.1

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