22280+5742 KR   60AB (DO Cep)

 
 
22h 27m 59.20s +57 41' 43.8" P.A. 229.7 sep 1.73 mag 9.93,11.41 Sp M3.5+M4.5 dist. 4 pc (13.05 l.y.)
 
 
Coord 2000
22280+5742
Discov num
KR   60
Comp
AB
Coord arcsec 2000
22 27 59.20 +57 41 43.8
Date first
1890
Date last
2016
Obs
292
Pa first
179
Pa last
266
P.A. Now (θ)
229.7°
Sep first
2.3
Sep last
1.5
Sep. Now (ρ)
1.73"
Mag pri
9.93
Mag sec
11.41
delta mag (ΔM)
1.48
Spectral class
M3.5+M4.5 (red/red)
Pri motion ra
-806
Sec motion ra
-713
Pri motion dec
-399
Sec motion dec
-321
Notes
N O (See Notes, Orbital solution)
rPM=0.135 (< 0.3, Physical double)
This double is physical.
 
 
22280+5742 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show DO Cep 22280+5742 KR 60 AB 1890 2016 292 230 1.7 9.93 11.41 1.48 Y <===
Show 22280+5742 KR 60 AC 1890 2016 83 62 139.8 9.93 10.53 0.60
Show 22280+5742 KR 60 AD 1900 2016 10 56 119.3 9.93 14.30 4.37
Show 22280+5742 KR 60 AE 1900 2016 17 77 163.0 9.93 13.33 3.40
Show 22280+5742 KR 60 AF 1901 2016 16 46 71.9 9.93 14.43 4.50
Show 22280+5742 KR 60 AG 1912 2016 6 114 68.4 9.93 15.14 5.21
Show 22280+5742 KR 60 AH 1912 2016 8 267 50.2 9.93 13.02 3.09
Show 22280+5742 KR 60 AI 1873 2016 18 119 238.2 9.93 8.31 1.62
Show 22280+5742 HEL 4 AJ 1999 2016 10 113 32.5 9.93 15.70 5.77
Show 22280+5742 HZE 5 AK 2006 2006 1 0 7.2 4.78 16.00 11.22
Show 22280+5742 FYM 118 AL 1999 2016 5 13 107.0 9.93 15.44 5.51
Show 22280+5742 FYM 118 AM 1999 2016 5 356 78.4 9.93 15.60 5.67
Show 22280+5742 FYM 118 AO 1999 2016 5 135 83.0 9.93 15.17 5.24
Show 22280+5742 FYM 118 AR 1999 2016 5 113 113.7 9.93 15.20 5.27
Show 22280+5742 FYM 118 AS 1999 2016 5 264 13.2 9.93 15.70 5.77
Show 22280+5742 FYM 118 AU 1999 2016 5 103 137.6 9.93 15.20 5.27
Show 22280+5742 KR 60 BC 1898 2016 60 62 141.2 11.41 10.53 0.88
Show 22280+5742 HEL 4 BJ 1999 2016 7 112 33.9 11.41 15.70 4.29
Show 22280+5742 FYM 118 CD 2003 2016 5 272 24.5 10.53 14.30 3.77
Show 22280+5742 KR 60 CE 1900 2016 16 130 45.9 10.53 13.33 2.80
Show 22280+5742 FYM 118 CN 1999 2016 6 52 42.1 10.53 14.92 4.39
Show 22280+5742 FYM 118 CP 1999 2016 6 320 46.5 10.53 14.79 4.26
Show 22280+5742 FYM 118 EQ 1999 2016 6 206 14.2 13.33 15.70 2.37
20-fold system
20 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
265.5
Precise sep
1.5
Var name
DO Cep
Constellation
Cepheus
HIP
110893
Tycho2
3991-00092-1
HD
239960
ADS
15972
GL
Gl 860A
BD
BD+56 2783
Distance
4
Distance ly
13.05
last precise pa
265.5
last precise sep
1.5
 
 
ORBITAL ELEMENTS
 
 
Period (P)44.67y Periastron (T)1970.22y Semi-major axis (a)2.383a
Eccentricity (e)0.41 Inclination (i)167.2° Longitude of periastron (ω)211°
Node (Ω)154.5° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation1985
label rho theta
2000 3.031 95.0
2001 2.949 90.5
2002 2.858 85.6
2003 2.758 80.5
2004 2.650 74.9
2005 2.532 68.8
2006 2.408 62.2
2007 2.276 54.7
2008 2.140 46.4
2009 2.000 36.9
2010 1.861 25.9
2011 1.726 13.3
2012 1.602 358.5
2013 1.499 341.5
2014 1.426 322.4
2015 1.396 301.8
2016 1.416 281.1
2017 1.486 261.7
2018 1.596 244.5
2019 1.734 229.7
2020 1.885 217.2
2021 2.041 206.7
2022 2.195 197.6
2023 2.343 189.7
2024 2.484 182.7
2025 2.614 176.4
2026 2.734 170.7
2027 2.843 165.5
2028 2.941 160.6
2029 3.028 156.1
2030 3.104 151.7

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






wds22280%2B5742a.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
22280+5742 KR 60 AB 2007 268 48 2.2 9.93 11.41 M3.5+M4.5 NOD 222800.42+574149.3
22280+5742 KR 60 AB 2008 270 42 2.1 9.93 11.41 M3.5+M4.5 NOD 222800.42+574149.3
22280+5742 KR 60 AB 2009 276 29 1.8 9.93 11.41 M3.5+M4.5 NOD 222800.42+574149.3
22280+5742 KR 60 AB 2010 283 17 1.6 9.93 11.41 M3.5+M4.5 NOD 222800.42+574149.3
22280+5742 KR 60 AB 2013 286 329 1.5 9.93 11.41 M3.5 M4.5 NOD 222759.20+574143.8
22280+5742 KR 60 AB 2015 289 288 1.4 9.93 11.41 M3.5+M4.5 NO 222759.20+574143.8
22280+5742 KR 60 AB 2016 291 266 1.5 9.93 11.41 M3.5+M4.5 NO 222759.20+574143.8

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