18443+3940 STF 2382 AB
18h 44m 20.34s +39° 40' 12.4" P.A. 345.00 sep 2.2 mag 5.15,6.10 Sp A4V+F1V dist. 49.78 pc (162.38 l.y.)
| Coord 2000 |
18443+3940 |
|
Discov num |
STF2382 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 44 20.34 +39 40 12.4 |
|
| Date first |
1777 |
|
Date last |
2021 |
|
Obs |
641 |
|
| Pa first |
45 |
|
Pa last |
344.7 |
|
P.A. Now (θ) |
344.7° |
|
| Sep first |
4.0 |
|
Sep last |
2.15 |
|
Sep. Now (ρ) |
2.15" |
|
| Mag pri |
5.15 |
|
Mag sec |
6.10 |
|
delta mag (ΔM) |
0.95 |
|
Spectral class |
A4V+F1V (white/yellow-white) |
|
| Pri motion ra |
+011 |
|
Sec motion ra |
+002 |
|
| Pri motion dec |
+061 |
|
Sec motion dec |
+047 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.269 (< 0.3, Physical double)
This double is physical.
18443+3940 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
67310 |
18 44 20 +39 40 12 |
STF 2382 AB |
2021 |
641 |
345 |
2.2 |
5.15 |
6.10 |
0.95 |
Y |
<=== |
| Show |
Double Double |
67310 |
18 44 20 +39 40 12 |
STFA 37 AB,CD |
2021 |
98 |
172 |
209.4 |
4.67 |
4.56 |
0.11 |
|
|
| Show |
|
67310 |
18 44 20 +39 40 12 |
STFA 37 AD |
2021 |
19 |
172 |
208.2 |
5.15 |
5.38 |
0.23 |
|
|
| Show |
|
67310 |
18 44 20 +39 40 12 |
STFA 37 AI |
2021 |
24 |
137 |
150.4 |
5.15 |
10.12 |
4.97 |
|
|
| Show |
|
67315 |
18 44 20 +39 40 14 |
STFA 37 BC |
2011 |
14 |
172 |
210.9 |
6.10 |
5.25 |
0.85 |
|
|
| Show |
|
67315 |
18 44 20 +39 40 14 |
STFA 37 BD |
2021 |
12 |
171 |
212.5 |
6.10 |
5.38 |
0.72 |
|
|
| Show |
|
|
18 44 20 +39 40 14 |
STFA 37 BI |
2015 |
10 |
137 |
151.3 |
6.10 |
10.12 |
4.02 |
|
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
CHR 77 Ca,Cb |
2005 |
5 |
225 |
0.1 |
5.25 |
|
|
Y |
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
STF 2383 CD |
2021 |
641 |
75 |
2.3 |
5.25 |
5.38 |
0.13 |
Y |
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
SHJ 277 CD,F |
2015 |
3 |
0 |
93.3 |
4.56 |
12.70 |
8.14 |
|
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
SHJ 277 CD,G |
2015 |
4 |
293 |
75.1 |
4.56 |
14.20 |
9.64 |
|
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
SHJ 277 CD,H |
2015 |
4 |
313 |
95.7 |
4.56 |
13.90 |
9.34 |
|
|
| Show |
|
67310 |
18 44 23 +39 36 46 |
STF 2383 CE |
2015 |
8 |
334 |
63.2 |
5.25 |
12.30 |
7.05 |
|
|
| Show |
|
|
18 44 23 +39 36 46 |
STFA 37 CI |
2012 |
18 |
37 |
120.4 |
5.25 |
10.12 |
4.87 |
|
|
| Show |
|
67315 |
18 44 23 +39 36 46 |
STFA 37 DI |
2000 |
6 |
37 |
121.6 |
5.38 |
10.12 |
4.74 |
|
|
| Show |
|
67310 |
18 44 20 +39 37 43 |
SHJ 277 EF |
2021 |
16 |
37 |
45.4 |
12.30 |
12.70 |
0.40 |
|
|
| Show |
|
67310 |
18 44 20 +39 37 43 |
SHJ 277 EG |
2015 |
11 |
236 |
50.0 |
12.30 |
14.20 |
1.90 |
|
|
| Show |
|
|
18 44 20 +39 37 43 |
STFA 37 EI |
2015 |
7 |
68 |
108.9 |
12.30 |
10.12 |
2.18 |
|
|
| Show |
|
|
18 44 17 +39 37 16 |
SHJ 277 GH |
2015 |
13 |
358 |
35.8 |
14.20 |
13.90 |
0.30 |
|
|
11-fold system
11 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Lyra |
|
SAO |
67310 |
|
HIP |
91919 |
|
Tycho2 |
3122-03438-2 |
|
| Gaia DR2 |
2098237660363229312 |
|
HD |
173582 |
|
HR |
7051 |
|
GC |
25667 |
|
| ADS |
11635 |
|
BD |
BD+39 3509 |
|
Bayer |
Epsilon 1 Lyrae |
|
Bayer name |
Eps1 Lyr |
|
| Flamsteed |
4 Lyrae |
|
Flamsteed name |
4 Lyr |
|
Distance |
49.78 |
|
Distance ly |
162.38 |
|
| Bayer greek |
ε1 Lyr |
|
ORBITAL ELEMENTS SOLUTION #1
| Period (P) | 1725y | |
Periastron (T) | 190y | |
Semi-major axis (a) | 4.17a | |
| Eccentricity (e) | 0.243 | |
Inclination (i) | 118.6° | |
Longitude of periastron (ω) | 198° | |
| Node (Ω) | 198° | |
Notes | n | |
Reference | WSI2004b | |
| Equinox | 2000 | |
Last observation | 2003 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
350.4 |
2.468 |
| 2001 |
350.1 |
2.460 |
| 2002 |
349.9 |
2.452 |
| 2003 |
349.6 |
2.444 |
| 2004 |
349.3 |
2.436 |
| 2005 |
349.0 |
2.428 |
| 2006 |
348.7 |
2.419 |
| 2007 |
348.4 |
2.411 |
| 2008 |
348.1 |
2.403 |
| 2009 |
347.8 |
2.395 |
| 2010 |
347.5 |
2.387 |
| 2011 |
347.2 |
2.378 |
| 2012 |
347.0 |
2.370 |
| 2013 |
346.7 |
2.362 |
| 2014 |
346.3 |
2.354 |
| 2015 |
346.0 |
2.346 |
| 2016 |
345.7 |
2.337 |
| 2017 |
345.4 |
2.329 |
| 2018 |
345.1 |
2.321 |
| 2019 |
344.8 |
2.313 |
| 2020 |
344.5 |
2.305 |
| 2021 |
344.2 |
2.296 |
| 2022 |
343.8 |
2.288 |
| 2023 |
343.5 |
2.280 |
| 2024 |
343.2 |
2.272 |
| 2025 |
342.9 |
2.264 |
| 2026 |
342.5 |
2.256 |
| 2027 |
342.2 |
2.248 |
| 2028 |
341.9 |
2.240 |
| 2029 |
341.5 |
2.231 |
| 2030 |
341.2 |
2.223 |
| 2031 |
340.9 |
2.215 |
| 2032 |
340.5 |
2.207 |
| 2033 |
340.2 |
2.199 |
| 2034 |
339.8 |
2.191 |
| 2035 |
339.5 |
2.183 |
| 2036 |
339.1 |
2.176 |
| 2037 |
338.7 |
2.168 |
| 2038 |
338.4 |
2.160 |
| 2039 |
338.0 |
2.152 |
| 2040 |
337.7 |
2.144 |
| 2041 |
337.3 |
2.136 |
| 2042 |
336.9 |
2.129 |
| 2043 |
336.5 |
2.121 |
| 2044 |
336.2 |
2.113 |
| 2045 |
335.8 |
2.106 |
| 2046 |
335.4 |
2.098 |
| 2047 |
335.0 |
2.090 |
| 2048 |
334.6 |
2.083 |
| 2049 |
334.2 |
2.075 |
| 2050 |
333.9 |
2.068 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
ORBITAL ELEMENTS SOLUTION #2
| Period (P) | 2802.8y | |
Periastron (T) | 2051.49y | |
Semi-major axis (a) | 14.237a | |
| Eccentricity (e) | 0.953 | |
Inclination (i) | 102.2° | |
Longitude of periastron (ω) | 258.8° | |
| Node (Ω) | 149.6° | |
Notes | n | |
Reference | Doc2020e | |
| Equinox | 2000 | |
Last observation | 2020 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
350.3 |
2.484 |
| 2001 |
350.0 |
2.472 |
| 2002 |
349.7 |
2.460 |
| 2003 |
349.5 |
2.448 |
| 2004 |
349.2 |
2.436 |
| 2005 |
348.9 |
2.423 |
| 2006 |
348.6 |
2.410 |
| 2007 |
348.3 |
2.396 |
| 2008 |
348.0 |
2.382 |
| 2009 |
347.7 |
2.368 |
| 2010 |
347.4 |
2.353 |
| 2011 |
347.1 |
2.338 |
| 2012 |
346.8 |
2.323 |
| 2013 |
346.5 |
2.307 |
| 2014 |
346.2 |
2.290 |
| 2015 |
345.9 |
2.273 |
| 2016 |
345.6 |
2.255 |
| 2017 |
345.2 |
2.237 |
| 2018 |
344.9 |
2.218 |
| 2019 |
344.5 |
2.198 |
| 2020 |
344.2 |
2.178 |
| 2021 |
343.8 |
2.157 |
| 2022 |
343.5 |
2.135 |
| 2023 |
343.1 |
2.112 |
| 2024 |
342.7 |
2.088 |
| 2025 |
342.3 |
2.064 |
| 2026 |
341.9 |
2.038 |
| 2027 |
341.5 |
2.011 |
| 2028 |
341.1 |
1.983 |
| 2029 |
340.7 |
1.953 |
| 2030 |
340.3 |
1.922 |
| 2031 |
339.8 |
1.889 |
| 2032 |
339.3 |
1.855 |
| 2033 |
338.8 |
1.819 |
| 2034 |
338.3 |
1.780 |
| 2035 |
337.8 |
1.739 |
| 2036 |
337.2 |
1.696 |
| 2037 |
336.6 |
1.650 |
| 2038 |
336.0 |
1.600 |
| 2039 |
335.3 |
1.546 |
| 2040 |
334.6 |
1.488 |
| 2041 |
333.8 |
1.426 |
| 2042 |
332.9 |
1.357 |
| 2043 |
332.0 |
1.281 |
| 2044 |
330.9 |
1.198 |
| 2045 |
329.6 |
1.105 |
| 2046 |
328.1 |
1.001 |
| 2047 |
326.3 |
0.884 |
| 2048 |
323.7 |
0.751 |
| 2049 |
320.1 |
0.601 |
| 2050 |
313.7 |
0.435 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
