17129+4220 BUP 176

 
 
17h 12m 55.08s +42° 19' 54.5" P.A. 300.00 sep 129.4 mag 10.26,9.92 Sp M1V dist. 25.23 pc (82.3 l.y.)
 
 
Coord 2000 17129+4220 Discov num BUP 176 Comp Coord arcsec 2000 17 12 55.08 +42 19 54.5
Date first 1912 Date last 2005 Obs 11
Pa first 279 Pa last 300.2 P.A. Now (θ) 300.2°
Sep first 209.4 Sep last 129.36 Sep. Now (ρ) 129.36"
Mag pri 10.26 Mag sec 9.92 delta mag (ΔM) 0.34 Spectral class M1V (red)
Pri motion ra -101 Sec motion ra -001
Pri motion dec -035 Sec motion dec +000
Notes N L P (See Notes, Linear solution, 100-year proper motion)
rPM=0.991
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hercules HIP 84223 Tycho2 3081-01154-1 GL GJ 1213
BD BD+42 2810 Distance 25.23 Distance ly 82.3
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier17129+4220 GJ 1213
coord_arcsec_2000171255.90+421957.4
Period (P)7.809y± 4.791 Periastron (T)1995.602y± 4.446 Semi-major axis (a)24.4m± 10.3
Eccentricity (e)0.41± 0.28 Inclination (i)111°± 10 Longitude of periastron (ω)103°± 72
Node (Ω)175°± 98 Notes ReferenceGln2007
Equinox Last observation1991 Grade9(1=Definitive, 9=Indet.)
label theta rho
2000 214.5 0.018
2001 193.4 0.024
2002 178.6 0.024
2003 146.6 0.010
2004 0.1 0.017
2005 336.5 0.020
2006 304.5 0.014
2007 247.9 0.013
2008 209.3 0.019
2009 190.5 0.024
2010 175.4 0.023
2011 117.9 0.006
2012 354.7 0.019
2013 331.9 0.019
2014 295.2 0.013
2015 238.0 0.014
2016 204.9 0.020
2017 187.7 0.025
2018 171.7 0.021
2019 60.0 0.006
2020 350.1 0.020
2021 326.8 0.018
2022 284.7 0.012
2023 229.4 0.015
2024 200.9 0.021
2025 184.9 0.025
2026 167.2 0.018
2027 24.5 0.009
2028 345.9 0.020
2029 321.0 0.017
2030 273.3 0.012


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



 
 


wds17130%2B4220r.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic