00008+1659 BAG  18

 
 
00h 00m 48.09s +16 59' 17.5" P.A. 332.60 sep 0.7 mag 8.79,12.60 Sp K0 dist. 31.59 pc (103.05 l.y.)
 
 
Coord 2000
00008+1659
Discov num
BAG  18
Comp
Coord arcsec 2000
00 00 48.09 +16 59 17.5
Date first
2001
Date last
2019
Obs
9
Pa first
37
Pa last
334
P.A. Now (θ)
332.6°
Sep first
0.5
Sep last
0.7
Sep. Now (ρ)
0.72"
Mag pri
8.79
Mag sec
12.60
delta mag (ΔM)
3.81
Spectral class
K0 (yellow-orange)
Pri motion ra
-100
Sec motion ra
Pri motion dec
-316
Sec motion dec
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
333.9
Precise sep
0.72
Constellation
Pegasus
SAO
108960
HIP
68
Tycho2
1178-01142-1
HD
224808
BD
BD+16 5027
Distance
31.59
Distance ly
103.05
last precise pa
333.9
last precise sep
0.72
 
 
ORBITAL ELEMENTS
 
 
Period (P)66.62y Periastron (T)1990.25y Semi-major axis (a)0.531a
Eccentricity (e)0.372 Inclination (i)192.3° Longitude of periastron (ω)358.9°
Node (Ω)142.2° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.463 48.0
2001 0.482 41.8
2002 0.502 36.1
2003 0.521 30.8
2004 0.540 25.9
2005 0.558 21.3
2006 0.575 17.0
2007 0.592 13.0
2008 0.607 9.1
2009 0.622 5.5
2010 0.636 2.0
2011 0.649 358.6
2012 0.661 355.4
2013 0.672 352.3
2014 0.682 349.3
2015 0.692 346.4
2016 0.700 343.5
2017 0.707 340.7
2018 0.713 338.0
2019 0.718 335.3
2020 0.722 332.6
2021 0.725 330.0
2022 0.727 327.3
2023 0.728 324.7
2024 0.728 322.1
2025 0.728 319.5
2026 0.726 316.9
2027 0.723 314.3
2028 0.719 311.6
2029 0.714 308.9
2030 0.708 306.2

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






wds00008%2B1659a.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
00008+1659 BAG 18 2001 1 37 0.5 8.79 12.60 D 000048.09+165917.5
00008+1659 BAG 18 2008 3 187 0.6 8.79 12.60 D 000048.09+165917.5
00008+1659 BAG 18 2010 5 1 0.6 8.79 12.60 K0 D 000048.09+165917.5
00008+1659 BAG 18 2015 6 344 0.7 8.79 12.60 K0 000048.09+165917.5
00008+1659 BAG 18 2018 8 336 0.7 8.79 12.60 K0 000048.09+165917.5
00008+1659 BAG 18 2019 9 334 0.7 8.79 12.60 K0 O 000048.09+165917.5

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