10490-7449 HEI 498

 
 
10h 48m 59.98s -74 49' 13.2" P.A. 125.90 sep 0.1 mag 9.80,9.80 Sp A5V
 
 
Coord 2000
10490-7449
Discov num
HEI 498
Comp
Coord arcsec 2000
10 48 59.98 -74 49 13.2
Date first
1989
Date last
2019
Obs
6
Pa first
309
Pa last
132
P.A. Now (θ)
125.9°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
9.80
Mag sec
9.80
delta mag (ΔM)
0
Spectral class
A5V (white)
Pri motion ra
-037
Sec motion ra
Pri motion dec
+006
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
131.6
Precise sep
0.096
Constellation
Hydra
Tycho2
9224-00980-1
Gaia DR2
5228716245835407744
HD
94081
last precise pa
131.6
last precise sep
0.096
 
 
ORBITAL ELEMENTS
 
 
Period (P)60y Periastron (T)2022.8y Semi-major axis (a)0.118a
Eccentricity (e)0.105 Inclination (i)120.1° Longitude of periastron (ω)170.7°
Node (Ω)294.1° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2020
label rho theta
2000 0.118 280.1
2001 0.113 277.0
2002 0.108 273.6
2003 0.102 269.8
2004 0.095 265.5
2005 0.089 260.6
2006 0.082 254.9
2007 0.076 248.1
2008 0.069 240.2
2009 0.064 230.8
2010 0.060 219.9
2011 0.058 207.9
2012 0.058 195.3
2013 0.059 183.0
2014 0.063 171.9
2015 0.068 162.1
2016 0.073 153.7
2017 0.079 146.6
2018 0.085 140.4
2019 0.091 135.1
2020 0.096 130.3
2021 0.100 125.9
2022 0.103 121.9
2023 0.105 118.0
2024 0.106 114.3
2025 0.105 110.6
2026 0.104 106.8
2027 0.101 102.8
2028 0.098 98.6
2029 0.094 94.1
2030 0.089 89.1


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



 
 


wds10490-7449a.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
10490-7449 HEI 498 1991 2 298 0.1 9.80 9.80 A5V 104859.98-744913.2
10490-7449 HEI 498 2018 4 134 0.1 9.80 9.80 A5V 104859.98-744913.2
10490-7449 HEI 498 2019 6 132 0.1 9.80 9.80 A5V 104859.98-744913.2

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