15542+1659 A  2080

 
 
15h 54m 10.28s +16 59' 28.0" P.A. 107.2 sep 0.39 mag 8.83,9.20 Sp F2 dist. 132.98 pc (433.78 l.y.)
 
 
Coord 2000
15542+1659
Discov num
A  2080
Comp
Coord arcsec 2000
15 54 10.28 +16 59 28.0
Date first
1909
Date last
2008
Obs
80
Pa first
317
Pa last
100
P.A. Now (θ)
107.2°
Sep first
0.2
Sep last
0.4
Sep. Now (ρ)
0.39"
Mag pri
8.83
Mag sec
9.20
delta mag (ΔM)
0.37
Spectral class
F2 (yellow-white)
Pri motion ra
+011
Sec motion ra
Pri motion dec
+001
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
99.9
Precise sep
0.373
Cdsa2 id
A 2080
Constellation
Serpens
SAO
101804
HIP
77875
Tycho2
1496-00733-1
HD
142455
ADS
9831
BD
BD+17 2929
Ra deg
15.902855555555556
De deg
16.991111111111113
Distance
132.98
Distance ly
433.78
last precise pa
99.9
last precise sep
0.373
 
 
ORBITAL ELEMENTS
 
 
Period (P)382.99y± 292.64 Periastron (T)2285.17y± 443.01 Semi-major axis (a)0.369a± 0.137
Eccentricity (e)0.157± 0.083 Inclination (i)62.9°± 4.5 Longitude of periastron (ω)40.7°± 217.2
Node (Ω)294°± 12.3 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2004
label rho theta
2000 0.341 99.4
2001 0.344 99.9
2002 0.347 100.4
2003 0.350 100.8
2004 0.352 101.3
2005 0.355 101.8
2006 0.358 102.2
2007 0.360 102.7
2008 0.363 103.1
2009 0.365 103.5
2010 0.368 104.0
2011 0.370 104.4
2012 0.373 104.8
2013 0.375 105.2
2014 0.377 105.6
2015 0.379 106.0
2016 0.381 106.4
2017 0.383 106.8
2018 0.385 107.2
2019 0.387 107.6
2020 0.389 108.0
2021 0.390 108.4
2022 0.392 108.7
2023 0.394 109.1
2024 0.395 109.5
2025 0.397 109.9
2026 0.398 110.2
2027 0.399 110.6
2028 0.401 110.9
2029 0.402 111.3
2030 0.403 111.7

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

grafico orbita





wds15542%2B1659a.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
15542+1659 A 2080 2004 75 100 0.4 8.83 9.20 F2 NOD 155410.28+165928.0
15542+1659 A 2080 2006 76 102 0.4 8.83 9.20 F2 NOD 155410.28+165928.0
15542+1659 A 2080 2008 78 100 0.4 8.83 9.20 F2 NOD 155410.28+165928.0

If you need more information about this double, apply for a data request form to the WDS.