21141+5818 STF2783

 
 
21H 14M 04.90S +58 17' 49.8" P.A. 351.5 SEP 0.67 MAG 7.71,8.07 SP A3V DIST. 127.88 PC (417.14 L.Y.)
 
 
Coord 2000
21141+5818
Discov num
STF2783
Comp
Coord arcsec 2000
21 14 04.90 +58 17 49.8
Date first
1828
Date last
2016
Obs
92
Pa first
37
Pa last
352
P.A. Now (θ)
351.5°
Sep first
2.0
Sep last
0.7
Sep. Now (ρ)
0.67"
Mag pri
7.71
Mag sec
8.07
delta mag (ΔM)
0.36
Spectral class
A3V (white)
Pri motion ra
-012
Sec motion ra
-012
Pri motion dec
-020
Sec motion dec
-020
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cepheus
SAO
33251
HIP
104812
Tycho2
3965-01093-1
HD
202519
ADS
14784
BD
BD+57 2303
Distance
127.88
Distance ly
417.14
last precise pa
351.8
last precise sep
0.72
 
 
ORBITAL ELEMENTS
 
 
Period (P)1760y Periastron (T)1835y Semi-major axis (a)1.685a
Eccentricity (e)0.22 Inclination (i)113.8° Longitude of periastron (ω)18.9°
Node (Ω)48.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 0.715 359.7
2001 0.711 359.2
2002 0.708 358.7
2003 0.705 358.3
2004 0.702 357.8
2005 0.699 357.4
2006 0.696 356.9
2007 0.693 356.4
2008 0.691 355.9
2009 0.688 355.5
2010 0.685 355.0
2011 0.682 354.5
2012 0.679 354.0
2013 0.677 353.5
2014 0.674 353.0
2015 0.671 352.5
2016 0.669 352.0
2017 0.666 351.5
2018 0.664 351.0
2019 0.661 350.4
2020 0.659 349.9
2021 0.656 349.4
2022 0.654 348.8
2023 0.652 348.3
2024 0.649 347.8
2025 0.647 347.2
2026 0.645 346.7
2027 0.643 346.1
2028 0.641 345.6
2029 0.639 345.0
2030 0.637 344.4

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