15282+0251 A 2175 (HD 137844)

 
 
15h 28m 12.94s +02° 51' 21.6" P.A. 223.00 sep 0.2 mag 8.78,9.09 Sp A5 dist. 250.63 pc (817.56 l.y.)
 
 
Coord 2000 15282+0251 Discov num A  2175 Comp Coord arcsec 2000 15 28 12.94 +02 51 21.6
Date first 1910 Date last 2021 Obs 51
Pa first 349 Pa last 222.8 P.A. Now (θ) 222.8°
Sep first 0.2 Sep last 0.198 Sep. Now (ρ) 0.198"
Mag pri 8.78 Mag sec 9.09 delta mag (ΔM) 0.31 Spectral class A5 (white)
Pri motion ra -016 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 137844 Constellation Serpens SAO 121015 HIP 75724
Tycho2 0341-00121-1 Gaia DR2 4421301323766535168 HD 137844 ADS 9654
BD BD+03 3034 Distance 250.63 Distance ly 817.56
 
 
ORBITAL ELEMENTS
 
 
Period (P)218.14y Periastron (T)1495.5y Semi-major axis (a)0.263a
Eccentricity (e)0.5 Inclination (i)65.5° Longitude of periastron (ω)254.4°
Node (Ω)177.6° Notesn ReferenceUSN2006b
Equinox2000 Last observation1998 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 201.2 0.266
2001 201.8 0.264
2002 202.4 0.263
2003 203.0 0.262
2004 203.6 0.260
2005 204.2 0.259
2006 204.8 0.258
2007 205.4 0.256
2008 206.0 0.255
2009 206.7 0.253
2010 207.3 0.251
2011 208.0 0.250
2012 208.6 0.248
2013 209.3 0.246
2014 210.0 0.244
2015 210.7 0.242
2016 211.4 0.241
2017 212.1 0.239
2018 212.8 0.237
2019 213.6 0.235
2020 214.3 0.233
2021 215.1 0.231
2022 215.8 0.229
2023 216.6 0.227
2024 217.4 0.225
2025 218.3 0.223
2026 219.1 0.221
2027 219.9 0.218
2028 220.8 0.216
2029 221.7 0.214
2030 222.6 0.212


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


 
  


wds15282%2B0251a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic