18239+5848 STF 2323 AB (39 Dra)
18h 23m 54.65s +58° 48' 02.1" P.A. 348.00 sep 3.6 mag 5.06,8.07 Sp A1V dist. 56.47 pc (184.21 l.y.)
| Coord 2000 |
18239+5848 |
|
Discov num |
STF2323 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 23 54.65 +58 48 02.1 |
|
| Date first |
1825 |
|
Date last |
2020 |
|
Obs |
146 |
|
| Pa first |
5 |
|
Pa last |
347.5 |
|
P.A. Now (θ) |
347.5° |
|
| Sep first |
3.6 |
|
Sep last |
3.55 |
|
Sep. Now (ρ) |
3.55" |
|
| Mag pri |
5.06 |
|
Mag sec |
8.07 |
|
delta mag (ΔM) |
3.01 |
|
Spectral class |
A1V (white) |
|
| Pri motion ra |
-037 |
|
Sec motion ra |
-038 |
|
| Pri motion dec |
+062 |
|
Sec motion dec |
+062 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.014 (< 0.3, Physical double)
This double is physical.
18239+5848 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
39 Dra |
30949 |
18 23 55 +58 48 02 |
STF 2323 AB |
2020 |
146 |
348 |
3.6 |
5.06 |
8.07 |
3.01 |
Y |
<=== |
| Show |
|
30949 |
18 23 55 +58 48 02 |
STF 2323 AC |
2020 |
67 |
20 |
88.9 |
5.06 |
7.95 |
2.89 |
|
|
| Show |
|
30949 |
18 23 55 +58 48 02 |
STF 2323 AF |
2008 |
3 |
80 |
150.5 |
5.06 |
12.90 |
7.84 |
|
|
| Show |
|
30949 |
18 23 55 +58 48 02 |
STF 2323 AG |
2003 |
3 |
244 |
35.8 |
5.06 |
13.30 |
8.24 |
|
|
| Show |
|
30949 |
18 23 55 +58 48 02 |
STF 2323 AH |
2000 |
2 |
93 |
44.2 |
5.06 |
14.40 |
9.34 |
|
|
| Show |
|
30950 |
18 23 55 +58 48 06 |
STF 2323 BC |
2017 |
36 |
20 |
86.5 |
8.07 |
7.95 |
0.12 |
|
|
| Show |
|
30950 |
18 23 58 +58 49 26 |
STF 2323 CD |
2015 |
10 |
68 |
198.2 |
7.90 |
11.00 |
3.10 |
|
|
Septuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
39 Dra |
|
Constellation |
Draco |
|
SAO |
30949 |
|
HIP |
90156 |
|
| Tycho2 |
3916-01982-1 |
|
Gaia DR2 |
2157548616097840000 |
|
HD |
170073 |
|
HR |
6923 |
|
| GC |
25151 |
|
ADS |
11336 |
|
BD |
BD+58 1809 |
|
Flamsteed |
39 Draconis |
|
| Flamsteed name |
39 Dra |
|
Distance |
56.47 |
|
Distance ly |
184.21 |
|
ORBITAL ELEMENTS
| Period (P) | 2455.6037y | ± 1102.6512 |
Periastron (T) | 1687.223y | ± 482.8617 |
Semi-major axis (a) | 6.35553a | ± 3.33114 |
| Eccentricity (e) | 0.81391 | ± 0.14841 |
Inclination (i) | 104.723° | ± 8.074 |
Longitude of periastron (ω) | 272.145° | ± 12.224 |
| Node (Ω) | 11.629° | ± 33.521 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
349.5 |
3.760 |
| 2001 |
349.4 |
3.761 |
| 2002 |
349.4 |
3.761 |
| 2003 |
349.3 |
3.762 |
| 2004 |
349.2 |
3.763 |
| 2005 |
349.2 |
3.763 |
| 2006 |
349.1 |
3.764 |
| 2007 |
349.0 |
3.764 |
| 2008 |
349.0 |
3.765 |
| 2009 |
348.9 |
3.765 |
| 2010 |
348.9 |
3.765 |
| 2011 |
348.8 |
3.766 |
| 2012 |
348.7 |
3.766 |
| 2013 |
348.7 |
3.767 |
| 2014 |
348.6 |
3.767 |
| 2015 |
348.6 |
3.767 |
| 2016 |
348.5 |
3.768 |
| 2017 |
348.4 |
3.768 |
| 2018 |
348.4 |
3.768 |
| 2019 |
348.3 |
3.769 |
| 2020 |
348.2 |
3.769 |
| 2021 |
348.2 |
3.769 |
| 2022 |
348.1 |
3.769 |
| 2023 |
348.1 |
3.770 |
| 2024 |
348.0 |
3.770 |
| 2025 |
347.9 |
3.770 |
| 2026 |
347.9 |
3.770 |
| 2027 |
347.8 |
3.770 |
| 2028 |
347.8 |
3.770 |
| 2029 |
347.7 |
3.771 |
| 2030 |
347.6 |
3.771 |
|
|
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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