17419+7209 STF 2241 AB (Dziban)
17h 41m 56.36s +72° 08' 55.8" P.A. 14.00 sep 29.6 mag 4.60,5.59 Sp F5IV+F8V dist. 22.84 pc (74.5 l.y.)
| Coord 2000 |
17419+7209 |
|
Discov num |
STF2241 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 41 56.36 +72 08 55.8 |
|
| Date first |
1800 |
|
Date last |
2019 |
|
Obs |
183 |
|
| Pa first |
14 |
|
Pa last |
14 |
|
P.A. Now (θ) |
14° |
|
| Sep first |
32.0 |
|
Sep last |
29.6 |
|
Sep. Now (ρ) |
29.6" |
|
| Mag pri |
4.60 |
|
Mag sec |
5.59 |
|
delta mag (ΔM) |
0.99 |
|
Spectral class |
F5IV+F8V (yellow-white/yellow-white) |
|
| Pri motion ra |
+027 |
|
Sec motion ra |
+029 |
|
| Pri motion dec |
-270 |
|
Sec motion dec |
-277 |
|
| Notes |
N
O
Z
(See Notes, Orbital solution, Parallax indicates components are physical) |
|
rPM=0.026 (< 0.3, Physical double)
This double is physical.
17419+7209 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Dziban |
8890 |
17 41 56 +72 08 56 |
STF 2241 AB |
2019 |
183 |
14 |
29.6 |
4.60 |
5.59 |
0.99 |
Y |
<=== |
| Show |
|
8890 |
17 41 56 +72 08 56 |
STF 2241 AC |
2004 |
14 |
107 |
78.1 |
4.60 |
11.05 |
6.45 |
|
|
| Show |
|
8890 |
17 41 56 +72 08 56 |
STF 2241 AD |
2004 |
3 |
66 |
105.9 |
4.60 |
12.98 |
8.38 |
|
|
| Show |
|
8890 |
17 41 56 +72 08 56 |
PIN 11 AE |
1999 |
1 |
144 |
69.0 |
3.50 |
14.18 |
10.68 |
|
|
| Show |
|
|
17 42 13 +72 08 32 |
STF 2241 CD |
2015 |
8 |
19 |
69.4 |
11.05 |
12.98 |
1.93 |
|
|
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Dziban |
|
Constellation |
Draco |
|
SAO |
8890 |
|
HIP |
86614 |
|
| Tycho2 |
4436-01425-1 |
|
Gaia DR2 |
1651268660202647296 |
|
HD |
162003 |
|
HR |
6636 |
|
| GC |
24089 |
|
ADS |
10759 |
|
GL |
Gl 694.1A |
|
DM |
BD+72 805 |
|
| BD |
BD+72 804 |
|
Bayer |
Psi Draconis |
|
Bayer name |
Psi Dra |
|
Flamsteed |
31 Draconis |
|
| Flamsteed name |
31 Dra |
|
FK5 |
670 |
|
Distance |
22.84 |
|
Distance ly |
74.5 |
|
| Bayer greek |
ψ Dra |
|
ORBITAL ELEMENTS
| Period (P) | 100c | ± 33 |
Periastron (T) | 3817y | ± 500 |
Semi-major axis (a) | 31a | ± 7 |
| Eccentricity (e) | 0.28 | ± 0.07 |
Inclination (i) | 55° | ± 4 |
Longitude of periastron (ω) | 99° | ± 36 |
| Node (Ω) | 16° | ± 1 |
Notes | n | |
Reference | Kis2009 | |
| Equinox | | |
Last observation | 2001 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
16.7 |
29.677 |
| 2001 |
16.8 |
29.671 |
| 2002 |
16.8 |
29.665 |
| 2003 |
16.8 |
29.659 |
| 2004 |
16.8 |
29.653 |
| 2005 |
16.9 |
29.647 |
| 2006 |
16.9 |
29.642 |
| 2007 |
16.9 |
29.636 |
| 2008 |
16.9 |
29.630 |
| 2009 |
16.9 |
29.624 |
| 2010 |
17.0 |
29.618 |
| 2011 |
17.0 |
29.611 |
| 2012 |
17.0 |
29.605 |
| 2013 |
17.0 |
29.599 |
| 2014 |
17.1 |
29.593 |
| 2015 |
17.1 |
29.587 |
| 2016 |
17.1 |
29.581 |
| 2017 |
17.1 |
29.575 |
| 2018 |
17.1 |
29.569 |
| 2019 |
17.2 |
29.563 |
| 2020 |
17.2 |
29.557 |
| 2021 |
17.2 |
29.551 |
| 2022 |
17.2 |
29.545 |
| 2023 |
17.2 |
29.538 |
| 2024 |
17.3 |
29.532 |
| 2025 |
17.3 |
29.526 |
| 2026 |
17.3 |
29.520 |
| 2027 |
17.3 |
29.514 |
| 2028 |
17.4 |
29.508 |
| 2029 |
17.4 |
29.501 |
| 2030 |
17.4 |
29.495 |
|
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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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