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 |
|
|
Coord arcsec 2000 |
19 48 10.35 +70 16 04.5 |
|
| Date first |
1823 |
|
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 |
|
|
| Pri motion dec |
+039 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 19482+7016 STF 2603 (Tyl) : NOTES
| discov_num |
notes |
refcode |
| STF2603 |
eps Dra = 63 Dra. A spectroscopic binary. |
D__1883 |
|
H 1 8. |
MEv2010 |
REFERENCES
| refcode |
metd |
author |
reference |
| D__1883 |
Ma - |
Dembowski, H. |
................... |
| D__1883 |
|
Misure micrometriche di Stelle Doppie e multiple... |
|
| D__1883 |
|
(Rome, Coi tipi del Salviucci), vol. I, 1883 |
|
| Izm2019 |
orb u |
Izmailov, I.S. |
2019AstL...45...30I |
| Izm2019 |
|
Ast. Lett. 45, 30, 2019 |
|
| Izm2019 |
|
(Orbital elements from weighted solutions used when available (Table 2), |
|
| Izm2019 |
|
unweighted elements (Table 1) used for remaining 29 systems.) |
|
| MEv2010 |
- |
MacEvoy, B. |
................... |
| MEv2010 |
|
private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) |
|
DISCOVERER
| idgroup |
discov |
author |
| 1 |
STF |
Struve, F.G.W. |
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 19482+7016 |
STF2603 |
|
2005 |
148 |
19 |
3.2 |
4.01 |
6.87 |
G7IIIb |
N D |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2007 |
150 |
20 |
3.1 |
4.01 |
6.87 |
G7IIIb |
N D |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2008 |
149 |
341 |
4.8 |
4.01 |
6.87 |
G7IIIb |
N D |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2010 |
151 |
19 |
3.0 |
4.01 |
6.87 |
G7IIIb |
N D |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2012 |
152 |
21 |
3.1 |
4.01 |
6.87 |
G7IIIb |
N D |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2017 |
153 |
21 |
3.2 |
4.01 |
6.87 |
G7IIIb |
N |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2021 |
158 |
22 |
3.0 |
4.01 |
6.87 |
G7IIIb |
NO |
194810.35+701604.5 |
| 19482+7016 |
STF2603 |
|
2022 |
159 |
20 |
3.5 |
4.01 |
6.87 |
G7IIIb |
NO |
194810.35+701604.5 |
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WDS 19482+7016 STF 2603 (Tyl) : VISUAL OBSERVATIONS REPORTS
WDS 19482+7016 STF 2603 (Tyl) : MEASURES
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WDS 19482+7016 (Tyl) : VIRTUAL EYEPIECE
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WDS 19482+7016 (Tyl) : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
