11218+1811 STF 1534 (HD 98736)
11h 21m 49.34s +18° 11' 24.0" P.A. 314.00 sep 5.1 mag 8.08,11.14 Sp G5 dist. 31.05 pc (101.29 l.y.)
| Coord 2000 |
11218+1811 |
|
Discov num |
STF1534 |
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Comp |
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Coord arcsec 2000 |
11 21 49.34 +18 11 24.0 |
|
| Date first |
1828 |
|
Date last |
2019 |
|
Obs |
85 |
|
| Pa first |
342 |
|
Pa last |
313.5 |
|
P.A. Now (θ) |
313.5° |
|
| Sep first |
4.8 |
|
Sep last |
5.065 |
|
Sep. Now (ρ) |
5.065" |
|
| Mag pri |
8.08 |
|
Mag sec |
11.14 |
|
delta mag (ΔM) |
3.06 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
-149 |
|
Sec motion ra |
-151 |
|
| Pri motion dec |
-095 |
|
Sec motion dec |
-096 |
|
| Notes |
O
T
(Orbital solution, Parallax indicates physical) |
|
rPM=0.012 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 98736 |
|
Constellation |
Leo |
|
SAO |
99573 |
|
HIP |
55486 |
|
| Tycho2 |
1437-00352-1 |
|
Gaia DR2 |
3977050728669174912 |
|
HD |
98736 |
|
GC |
15608 |
|
| ADS |
8140 |
|
GL |
Gl 426A |
|
BD |
BD+19 2443 |
|
Distance |
31.05 |
|
| Distance ly |
101.29 |
|
ORBITAL ELEMENTS
| Period (P) | 1676.1789y | ± 600.8064 |
Periastron (T) | 1717.6181y | ± 409.2248 |
Semi-major axis (a) | 9.61813a | ± 5.46224 |
| Eccentricity (e) | 0.82209 | ± 0.13305 |
Inclination (i) | 105.502° | ± 7.503 |
Longitude of periastron (ω) | 95.699° | ± 12.085 |
| Node (Ω) | 170.983° | ± 54.518 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
315.9 |
5.123 |
| 2001 |
315.8 |
5.121 |
| 2002 |
315.7 |
5.120 |
| 2003 |
315.5 |
5.118 |
| 2004 |
315.4 |
5.116 |
| 2005 |
315.3 |
5.114 |
| 2006 |
315.2 |
5.112 |
| 2007 |
315.1 |
5.110 |
| 2008 |
315.0 |
5.108 |
| 2009 |
314.9 |
5.106 |
| 2010 |
314.7 |
5.104 |
| 2011 |
314.6 |
5.102 |
| 2012 |
314.5 |
5.100 |
| 2013 |
314.4 |
5.098 |
| 2014 |
314.3 |
5.096 |
| 2015 |
314.2 |
5.094 |
| 2016 |
314.0 |
5.092 |
| 2017 |
313.9 |
5.090 |
| 2018 |
313.8 |
5.088 |
| 2019 |
313.7 |
5.086 |
| 2020 |
313.6 |
5.084 |
| 2021 |
313.5 |
5.082 |
| 2022 |
313.3 |
5.080 |
| 2023 |
313.2 |
5.078 |
| 2024 |
313.1 |
5.076 |
| 2025 |
313.0 |
5.073 |
| 2026 |
312.9 |
5.071 |
| 2027 |
312.8 |
5.069 |
| 2028 |
312.6 |
5.067 |
| 2029 |
312.5 |
5.065 |
| 2030 |
312.4 |
5.062 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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