20298+0941 AST   2AB

 
 
20h 29m 48.41s +09 41' 19.3" P.A. 94.00 sep 0.2 mag 13.11,16.38 Sp M4.5V
 
 
Coord 2000
20298+0941
Discov num
AST   2
Comp
AB
Coord arcsec 2000
20 29 48.41 +09 41 19.3
Date first
1996
Date last
2019
Obs
13
Pa first
269
Pa last
94
P.A. Now (θ)
94°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
13.11
Mag sec
16.38
delta mag (ΔM)
3.27
Spectral class
M4.5V (red)
Pri motion ra
+704
Sec motion ra
Pri motion dec
+092
Sec motion dec
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
20298+0941 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20298+0941 AST 2 AB 1996 2019 13 94 0.2 13.11 16.38 3.27 Y <===
Show 20298+0941 CRC 37 AD 2012 2012 1 201 9.2 8.20
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
93.8
Precise sep
0.161
Constellation
Delphinus
last precise pa
93.8
last precise sep
0.161
 
 
ORBITAL ELEMENTS
 
 
Period (P)1.4694y Periastron (T)2019.248y Semi-major axis (a)0.11a
Eccentricity (e)0.645 Inclination (i)138° Longitude of periastron (ω)232.7°
Node (Ω)129.6° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2019
label rho theta
2000 0.070 2.6
2001 0.144 76.2
2002 0.144 110.2
2003 0.058 337.4
2004 0.137 71.0
2005 0.151 105.5
2006 0.041 294.9
2007 0.129 65.2
2008 0.155 101.1
2009 0.035 202.1
2010 0.120 58.6
2011 0.157 96.8
2012 0.064 154.3
2013 0.111 50.9
2014 0.157 92.6
2015 0.091 136.9
2016 0.100 41.6
2017 0.155 88.4
2018 0.111 126.8
2019 0.089 30.1
2020 0.152 84.1
2021 0.127 119.5
2022 0.078 15.2
2023 0.148 79.5
2024 0.138 113.7
2025 0.066 355.3
2026 0.142 74.6
2027 0.146 108.6
2028 0.053 326.3
2029 0.135 69.2
2030 0.152 104.0

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






wds20298%2B0941c.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
20298+0941 AST 2 AB 1997 14 212 0.0 13.11 16.38 M4.5V NO 202948.41+094119.3
20298+0941 AST 2 AB 2019 13 94 0.2 13.11 16.38 M4.5V NO 202948.41+094119.3

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