11272-1539 HU 462 (HD 99565)

 
 
11h 27m 10.78s -15° 38' 55.0" P.A. 35.00 sep 0.5 mag 8.42,8.53 Sp G8V dist. 35.95 pc (117.27 l.y.)
 
 
Coord 2000 11272-1539 Discov num HU  462 Comp Coord arcsec 2000 11 27 10.78 -15 38 55.0
Date first 1902 Date last 2021 Obs 103
Pa first 220 Pa last 35.1 P.A. Now (θ) 21.1°
Sep first 0.6 Sep last 0.462 Sep. Now (ρ) 0.475"
Mag pri 8.42 Mag sec 8.53 delta mag (ΔM) 0.11 Spectral class G8V (yellow)
Pri motion ra +002 Sec motion ra +002
Pri motion dec -197 Sec motion dec -197
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 99565 Constellation Crater SAO 156686 HIP 55875
Tycho2 6085-00695-1 HD 99565 ADS 8166 BD BD-14 3326
Distance 35.95 Distance ly 117.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)48.45y± 0.74 Periastron (T)1959.8y± 1.3 Semi-major axis (a)0.465a± 0.006
Eccentricity (e)0.098± 0.012 Inclination (i)164.3°± 3.9 Longitude of periastron (ω)15.1°± 6.4
Node (Ω)157°± 11 Notesn ReferenceMsn2021c
Equinox Last observation2021 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 212.6 0.435
2001 204.4 0.432
2002 196.1 0.429
2003 187.7 0.427
2004 179.3 0.425
2005 170.7 0.423
2006 162.1 0.422
2007 153.4 0.420
2008 144.6 0.419
2009 135.8 0.418
2010 127.0 0.417
2011 118.1 0.416
2012 109.2 0.417
2013 100.4 0.418
2014 91.7 0.420
2015 83.0 0.424
2016 74.5 0.428
2017 66.2 0.433
2018 58.1 0.439
2019 50.2 0.446
2020 42.6 0.453
2021 35.2 0.460
2022 28.0 0.468
2023 21.1 0.475
2024 14.4 0.482
2025 7.8 0.489
2026 1.5 0.494
2027 355.2 0.499
2028 349.1 0.503
2029 343.1 0.507
2030 337.1 0.509


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



 
 


wds11272-1539c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic