18443+3940 CHR 77 Ca,Cb
18h 44m 22.78s +39° 36' 45.8" P.A. 225.00 sep 0.1 mag 5.25, Sp A6IV dist. 47.69 pc (155.56 l.y.)
Coord 2000 |
18443+3940 |
|
Discov num |
CHR 77 |
|
Comp |
Ca,Cb |
|
Coord arcsec 2000 |
18 44 22.78 +39 36 45.8 |
|
Date first |
1985 |
|
Date last |
2005 |
|
Obs |
5 |
|
Pa first |
66 |
|
Pa last |
224.5 |
|
P.A. Now (θ) |
224.5° |
|
Sep first |
0.2 |
|
Sep last |
0.058 |
|
Sep. Now (ρ) |
0.058" |
|
Mag pri |
5.25 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
A6IV (white) |
|
Pri motion ra |
+008 |
|
Sec motion ra |
|
|
Pri motion dec |
+054 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
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
Var name |
NSV11301 Lyr |
|
Constellation |
Lyra |
|
SAO |
67315 |
|
HIP |
91926 |
|
Tycho2 |
3122-03439-1 |
|
Gaia DR2 |
2098202128093842432 |
|
HD |
173607 |
|
HR |
7053 |
|
GC |
25668 |
|
ADS |
11635 |
|
BD |
BD+39 3510 |
|
Bayer |
Epsilon 2 Lyrae |
|
Bayer name |
Eps2 Lyr |
|
Flamsteed |
5 Lyrae |
|
Flamsteed name |
5 Lyr |
|
Distance |
47.69 |
|
Distance ly |
155.56 |
|
Bayer greek |
ε2 Lyr |
|
ORBITAL ELEMENTS
Period (P) | 15.75y | |
Periastron (T) | 2008.94y | |
Semi-major axis (a) | 0.191a | |
Eccentricity (e) | 0.411 | |
Inclination (i) | 109.9° | |
Longitude of periastron (ω) | 127.2° | |
Node (Ω) | 42.4° | |
Notes | n | |
Reference | Doc2020e | |
Equinox | 2000 | |
Last observation | 2005 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
77.4 |
0.142 |
2001 |
67.1 |
0.177 |
2002 |
60.0 |
0.205 |
2003 |
54.4 |
0.224 |
2004 |
49.4 |
0.230 |
2005 |
44.3 |
0.219 |
2006 |
38.2 |
0.188 |
2007 |
28.0 |
0.131 |
2008 |
350.2 |
0.053 |
2009 |
243.9 |
0.079 |
2010 |
220.8 |
0.130 |
2011 |
206.0 |
0.129 |
2012 |
186.8 |
0.103 |
2013 |
155.1 |
0.082 |
2014 |
115.9 |
0.086 |
2015 |
89.2 |
0.115 |
2016 |
74.3 |
0.151 |
2017 |
65.1 |
0.184 |
2018 |
58.5 |
0.211 |
2019 |
53.1 |
0.226 |
2020 |
48.2 |
0.229 |
2021 |
42.9 |
0.214 |
2022 |
36.2 |
0.176 |
2023 |
23.6 |
0.112 |
2024 |
319.3 |
0.041 |
2025 |
235.5 |
0.097 |
2026 |
217.1 |
0.133 |
2027 |
201.9 |
0.123 |
2028 |
180.3 |
0.097 |
2029 |
145.1 |
0.080 |
2030 |
107.8 |
0.092 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|