15273+1738 A  2074

 
 
15H 27M 20.82S +17 38' 06.3" P.A. 267.2 SEP 0.28 MAG 8.55,9.37 SP F8 DIST. 90.74 PC (295.99 L.Y.)
 
 
Coord 2000
15273+1738
Discov num
A  2074
Comp
Coord arcsec 2000
15 27 20.82 +17 38 06.3
Date first
1909
Date last
2008
Obs
66
Pa first
275
Pa last
266
P.A. Now (θ)
267.2°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.28"
Mag pri
8.55
Mag sec
9.37
delta mag (ΔM)
0.82
Spectral class
F8 (yellow-white)
Pri motion ra
-088
Sec motion ra
Pri motion dec
+039
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Serpens
SAO
101563
HIP
75653
Tycho2
1490-00912-1
HD
137792
ADS
9645
BD
BD+18 3024
Distance
90.74
Distance ly
295.99
last precise pa
265.6
last precise sep
0.332
 
 
ORBITAL ELEMENTS
 
 
Period (P)59y Periastron (T)1981.9y Semi-major axis (a)0.206a
Eccentricity (e)0.9 Inclination (i)59.9° Longitude of periastron (ω)305.2°
Node (Ω)117.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation1973
label rho theta
2000 0.222 252.3
2001 0.229 253.5
2002 0.235 254.5
2003 0.242 255.5
2004 0.247 256.5
2005 0.252 257.4
2006 0.257 258.2
2007 0.262 259.1
2008 0.266 259.9
2009 0.270 260.7
2010 0.273 261.4
2011 0.276 262.2
2012 0.278 262.9
2013 0.280 263.7
2014 0.282 264.4
2015 0.283 265.1
2016 0.284 265.8
2017 0.284 266.5
2018 0.284 267.2
2019 0.283 267.9
2020 0.282 268.6
2021 0.281 269.3
2022 0.279 270.0
2023 0.276 270.8
2024 0.272 271.5
2025 0.269 272.3
2026 0.264 273.1
2027 0.259 273.9
2028 0.253 274.8
2029 0.246 275.7
2030 0.238 276.7

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