19482+7016 STF 2603 (Tyl)
19h 48m 10.35s +70° 16' 04.5" P.A. 20.00 sep 3.5 mag 4.01,6.87 Sp G7IIIb dist. 45.37 pc (148 l.y.)
| Coord 2000 |
19482+7016 |
|
Discov num |
STF2603 |
|
Comp |
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Coord arcsec 2000 |
19 48 10.35 +70 16 04.5 |
|
| Date first |
1823 |
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Date last |
2022 |
|
Obs |
159 |
|
| Pa first |
355 |
|
Pa last |
20 |
|
P.A. Now (θ) |
20° |
|
| Sep first |
2.6 |
|
Sep last |
3.5 |
|
Sep. Now (ρ) |
3.5" |
|
| Mag pri |
4.01 |
|
Mag sec |
6.87 |
|
delta mag (ΔM) |
2.86 |
|
Spectral class |
G7IIIb (yellow) |
|
| Pri motion ra |
+079 |
|
Sec motion ra |
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|
| Pri motion dec |
+039 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Tyl |
|
Var name |
NSV12465 Dra |
|
Constellation |
Draco |
|
SAO |
9540 |
|
| HIP |
97433 |
|
Tycho2 |
4449-02652-1 |
|
Gaia DR2 |
2251191616253487360 |
|
HD |
188119 |
|
| HR |
7582 |
|
GC |
27471 |
|
ADS |
13007 |
|
BD |
BD+69 1070 |
|
| Bayer |
Epsilon Draconis |
|
Bayer name |
Eps Dra |
|
Flamsteed |
63 Draconis |
|
Flamsteed name |
63 Dra |
|
| Distance |
45.37 |
|
Distance ly |
148 |
|
Bayer greek |
ε Dra |
|
ORBITAL ELEMENTS
| Period (P) | 2753.3257y | ± 1292.0608 |
Periastron (T) | 1598.5654y | ± 561.9011 |
Semi-major axis (a) | 8.01058a | ± 4.07389 |
| Eccentricity (e) | 0.83937 | ± 0.13066 |
Inclination (i) | 70.932° | ± 9.569 |
Longitude of periastron (ω) | 111.258° | ± 28.09 |
| Node (Ω) | 128.309° | ± 68.794 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2012 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
18.6 |
3.157 |
| 2001 |
18.8 |
3.159 |
| 2002 |
18.9 |
3.161 |
| 2003 |
19.1 |
3.163 |
| 2004 |
19.2 |
3.165 |
| 2005 |
19.4 |
3.167 |
| 2006 |
19.5 |
3.169 |
| 2007 |
19.7 |
3.171 |
| 2008 |
19.8 |
3.173 |
| 2009 |
20.0 |
3.175 |
| 2010 |
20.1 |
3.177 |
| 2011 |
20.3 |
3.180 |
| 2012 |
20.4 |
3.182 |
| 2013 |
20.6 |
3.184 |
| 2014 |
20.7 |
3.186 |
| 2015 |
20.9 |
3.188 |
| 2016 |
21.0 |
3.190 |
| 2017 |
21.2 |
3.192 |
| 2018 |
21.3 |
3.194 |
| 2019 |
21.5 |
3.196 |
| 2020 |
21.6 |
3.199 |
| 2021 |
21.7 |
3.201 |
| 2022 |
21.9 |
3.203 |
| 2023 |
22.0 |
3.205 |
| 2024 |
22.2 |
3.207 |
| 2025 |
22.3 |
3.210 |
| 2026 |
22.5 |
3.212 |
| 2027 |
22.6 |
3.214 |
| 2028 |
22.8 |
3.216 |
| 2029 |
22.9 |
3.219 |
| 2030 |
23.0 |
3.221 |
| 2031 |
23.2 |
3.223 |
| 2032 |
23.3 |
3.225 |
| 2033 |
23.5 |
3.228 |
| 2034 |
23.6 |
3.230 |
| 2035 |
23.8 |
3.232 |
| 2036 |
23.9 |
3.235 |
| 2037 |
24.0 |
3.237 |
| 2038 |
24.2 |
3.239 |
| 2039 |
24.3 |
3.242 |
| 2040 |
24.5 |
3.244 |
| 2041 |
24.6 |
3.247 |
| 2042 |
24.8 |
3.249 |
| 2043 |
24.9 |
3.251 |
| 2044 |
25.0 |
3.254 |
| 2045 |
25.2 |
3.256 |
| 2046 |
25.3 |
3.259 |
| 2047 |
25.5 |
3.261 |
| 2048 |
25.6 |
3.263 |
| 2049 |
25.7 |
3.266 |
| 2050 |
25.9 |
3.268 |
|
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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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