12564-0057 STT 256

 
 
12h 56m 26.59s -00 57' 16.6" P.A. 101.10 sep 1.1 mag 7.33,7.61 Sp F7V dist. 79.62 pc (259.72 l.y.)
 
 
Coord 2000
12564-0057
Discov num
STT 256
Comp
Coord arcsec 2000
12 56 26.59 -00 57 16.6
Date first
1843
Date last
2017
Obs
206
Pa first
40
Pa last
101
P.A. Now (θ)
101.1°
Sep first
0.6
Sep last
1.1
Sep. Now (ρ)
1.08"
Mag pri
7.33
Mag sec
7.61
delta mag (ΔM)
0.28
Spectral class
F7V (yellow-white)
Pri motion ra
+027
Sec motion ra
+027
Pri motion dec
-092
Sec motion dec
-092
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
100.7
Precise sep
1.057
Constellation
Virgo
SAO
139053
HIP
63155
Tycho2
4950-00568-1
HD
112398
ADS
8708
Distance
79.62
Distance ly
259.72
last precise pa
100.7
last precise sep
1.057
 
 
ORBITAL ELEMENTS
 
 
Period (P)605y Periastron (T)1749.7y Semi-major axis (a)1.549a
Eccentricity (e)0.9 Inclination (i)75° Longitude of periastron (ω)108.1°
Node (Ω)143.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2013
label rho theta
2000 1.016 98.2
2001 1.019 98.3
2002 1.022 98.5
2003 1.025 98.6
2004 1.028 98.8
2005 1.032 98.9
2006 1.035 99.1
2007 1.038 99.2
2008 1.041 99.4
2009 1.044 99.5
2010 1.047 99.7
2011 1.050 99.8
2012 1.053 100.0
2013 1.056 100.1
2014 1.059 100.3
2015 1.062 100.4
2016 1.065 100.5
2017 1.068 100.7
2018 1.071 100.8
2019 1.074 101.0
2020 1.077 101.1
2021 1.080 101.2
2022 1.083 101.4
2023 1.086 101.5
2024 1.089 101.7
2025 1.092 101.8
2026 1.095 101.9
2027 1.098 102.1
2028 1.100 102.2
2029 1.103 102.3
2030 1.106 102.5

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






wds12564-0057a.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
12564-0057 STT 256 2006 222 99 1.0 7.33 7.61 F7V D 125626.59-005716.6
12564-0057 STT 256 2007 223 98 1.0 7.33 7.61 F7V D 125626.59-005716.6
12564-0057 STT 256 2010 224 99 1.1 7.33 7.61 F7V D 125626.59-005716.6
12564-0057 STT 256 2013 225 101 1.1 7.33 7.61 F7V D 125626.59-005716.6
12564-0057 STT 256 2014 202 99 1.1 7.33 7.61 F7V O 125626.59-005716.6
12564-0057 STT 256 2017 204 101 1.1 7.33 7.61 F7V C 125626.59-005716.6

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