15186+2356 COU 307

 
 
15h 18m 34.84s +23 56' 42.8" P.A. 355.2 sep 0.36 mag 9.50,9.60 Sp G0
 
 
Coord 2000
15186+2356
Discov num
COU 307
Comp
Coord arcsec 2000
15 18 34.84 +23 56 42.8
Date first
1968
Date last
2010
Obs
17
Pa first
64
Pa last
3
P.A. Now (θ)
355.2°
Sep first
0.2
Sep last
0.4
Sep. Now (ρ)
0.36"
Mag pri
9.50
Mag sec
9.60
delta mag (ΔM)
0.1
Spectral class
G0 (yellow)
Pri motion ra
-002
Sec motion ra
Pri motion dec
+061
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
3.4
Precise sep
0.35
Cdsa2 id
COU 307
Constellation
Serpens
Tycho2
2025-00994-1
Ra deg
15.309677777777779
De deg
23.945222222222224
last precise pa
3.4
last precise sep
0.35
 
 
ORBITAL ELEMENTS
 
 
Period (P)300y Periastron (T)1964.7y Semi-major axis (a)0.597a
Eccentricity (e)0.76 Inclination (i)117.6° Longitude of periastron (ω)288.4°
Node (Ω)59.1° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.336 14.2
2001 0.337 13.1
2002 0.339 12.0
2003 0.340 10.8
2004 0.342 9.7
2005 0.343 8.6
2006 0.345 7.6
2007 0.346 6.5
2008 0.348 5.4
2009 0.349 4.3
2010 0.351 3.3
2011 0.352 2.2
2012 0.354 1.2
2013 0.355 0.2
2014 0.357 359.2
2015 0.358 358.2
2016 0.360 357.2
2017 0.361 356.2
2018 0.363 355.2
2019 0.364 354.2
2020 0.366 353.2
2021 0.367 352.3
2022 0.369 351.3
2023 0.371 350.4
2024 0.372 349.5
2025 0.374 348.5
2026 0.376 347.6
2027 0.377 346.7
2028 0.379 345.8
2029 0.381 344.9
2030 0.383 344.0

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

grafico orbita





wds15186%2B2356e.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
15186+2356 COU 307 1997 14 17 0.3 9.50 9.60 G0 O 151834.84+235642.8
15186+2356 COU 307 2008 15 4 0.3 9.50 9.60 G0 O 151834.84+235642.8
15186+2356 COU 307 2010 17 3 0.4 9.50 9.60 G0 O 151834.84+235642.8

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