15370+6426 HU 1168

 
 
15H 37M 00.37S +64 26' 23.3" P.A. 288 SEP 0.51 MAG 9.48,9.73 SP G5 DIST. 55.71 PC (181.73 L.Y.)
 
 
Coord 2000
15370+6426
Discov num
HU 1168
Comp
Coord arcsec 2000
15 37 00.37 +64 26 23.3
Date first
1905
Date last
2008
Obs
34
Pa first
318
Pa last
298
P.A. Now (θ)
288°
Sep first
0.3
Sep last
0.5
Sep. Now (ρ)
0.51"
Mag pri
9.48
Mag sec
9.73
delta mag (ΔM)
0.25
Spectral class
G5 (yellow)
Pri motion ra
-001
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
Draco
SAO
16785
HIP
76466
Tycho2
4184-00297-1
HD
139905
ADS
9730
BD
BD+64 1081
Distance
55.71
Distance ly
181.73
last precise pa
297.7
last precise sep
0.539
 
 
ORBITAL ELEMENTS
 
 
Period (P)88.57y± 0.7 Periastron (T)1984.44y± 0.09 Semi-major axis (a)0.376a± 0.06
Eccentricity (e)0.599± 0.006 Inclination (i)122.7°± 2 Longitude of periastron (ω)47.7°± 18.5
Node (Ω)127.8°± 11 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.405 307.7
2001 0.419 306.3
2002 0.431 304.9
2003 0.443 303.6
2004 0.453 302.4
2005 0.463 301.2
2006 0.471 300.0
2007 0.479 298.9
2008 0.485 297.9
2009 0.491 296.8
2010 0.496 295.8
2011 0.500 294.8
2012 0.503 293.8
2013 0.506 292.8
2014 0.508 291.9
2015 0.509 290.9
2016 0.510 289.9
2017 0.510 289.0
2018 0.509 288.0
2019 0.508 287.1
2020 0.506 286.1
2021 0.504 285.1
2022 0.501 284.1
2023 0.498 283.1
2024 0.494 282.1
2025 0.490 281.1
2026 0.485 280.1
2027 0.480 279.0
2028 0.475 277.9
2029 0.469 276.8
2030 0.463 275.6

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