15550-1923 HU 1274 (47 Lib)

 
 
15H 55M 00.37S -19 22' 58.4" P.A. 113.8 SEP 0.43 MAG 6.04,8.50 SP B5V DIST. 236.41 PC (771.17 L.Y.)
 
 
Coord 2000
15550-1923
Discov num
HU 1274
Comp
Coord arcsec 2000
15 55 00.37 -19 22 58.4
Date first
1904
Date last
2009
Obs
38
Pa first
154
Pa last
117
P.A. Now (θ)
113.8°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.43"
Mag pri
6.04
Mag sec
8.50
delta mag (ΔM)
2.46
Spectral class
B5V (blue-white)
Pri motion ra
-010
Sec motion ra
-010
Pri motion dec
-014
Sec motion dec
-014
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
47 Lib
Constellation
Libra
SAO
159572
HIP
77939
Tycho2
6195-00249-1
HD
142378
HR
5915
GC
21364
ADS
9834
BD
BD-18 4195
CP
CP-19 5926
Flamsteed
47 Librae
Flamsteed name
47 Lib
Distance
236.41
Distance ly
771.17
last precise pa
116.5
last precise sep
0.475
 
 
ORBITAL ELEMENTS
 
 
Period (P)361y Periastron (T)1974.3y Semi-major axis (a)0.576a
Eccentricity (e)0 Inclination (i)101.7° Longitude of periastron (ω)
Node (Ω)124.4° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.522 118.8
2001 0.518 118.6
2002 0.513 118.3
2003 0.509 118.1
2004 0.504 117.8
2005 0.499 117.6
2006 0.494 117.3
2007 0.489 117.0
2008 0.484 116.7
2009 0.479 116.4
2010 0.473 116.1
2011 0.468 115.8
2012 0.462 115.5
2013 0.456 115.2
2014 0.450 114.9
2015 0.444 114.5
2016 0.438 114.2
2017 0.431 113.8
2018 0.425 113.5
2019 0.418 113.1
2020 0.412 112.7
2021 0.405 112.3
2022 0.398 111.9
2023 0.391 111.5
2024 0.384 111.0
2025 0.377 110.6
2026 0.370 110.1
2027 0.362 109.6
2028 0.355 109.0
2029 0.347 108.5
2030 0.340 107.9

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic