18596+1504 ENG 65 AB (Deneb el okab)
18h 59m 37.39s +15° 04' 06.5" P.A. 184.00 sep 122.0 mag 4.13,10.56 Sp K1-III dist. 47.51 pc (154.98 l.y.)
| Coord 2000 |
18596+1504 |
|
Discov num |
ENG 65 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 59 37.39 +15 04 06.5 |
|
| Date first |
1887 |
|
Date last |
2014 |
|
Obs |
16 |
|
| Pa first |
187 |
|
Pa last |
183.8 |
|
P.A. Now (θ) |
183.8° |
|
| Sep first |
132.4 |
|
Sep last |
122.003 |
|
Sep. Now (ρ) |
122.003" |
|
| Mag pri |
4.13 |
|
Mag sec |
10.56 |
|
delta mag (ΔM) |
6.43 |
|
Spectral class |
K1-III (yellow-orange) |
|
| Pri motion ra |
-051 |
|
Sec motion ra |
+002 |
|
| Pri motion dec |
-069 |
|
Sec motion dec |
+002 |
|
| Notes |
N
S
(See Notes, Parallax indidates non-physical) |
|
rPM=1.033
This double is not physical.
18596+1504 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Deneb el okab |
104318 |
18 59 37 +15 04 06 |
ENG 65 AB |
2014 |
16 |
184 |
122.0 |
4.13 |
10.56 |
6.43 |
Y |
<=== |
| Show |
|
104318 |
18 59 37 +15 04 06 |
ENG 65 AC |
2014 |
12 |
159 |
142.9 |
4.13 |
11.25 |
7.12 |
|
|
| Show |
|
|
18 59 37 +15 02 02 |
ENG 65 BC |
2015 |
17 |
102 |
59.8 |
10.56 |
11.25 |
0.69 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Deneb el okab |
|
Constellation |
Aquila |
|
SAO |
104318 |
|
HIP |
93244 |
|
| Tycho2 |
1585-02531-1 |
|
Gaia DR2 |
4506929502664775680 |
|
HD |
176411 |
|
HR |
7176 |
|
| GC |
26091 |
|
BD |
BD+14 3736 |
|
Bayer |
Epsilon Aquilae |
|
Bayer name |
Eps Aql |
|
| Flamsteed |
13 Aquilae |
|
Flamsteed name |
13 Aql |
|
FK5 |
712 |
|
Distance |
47.51 |
|
| Distance ly |
154.98 |
|
Bayer greek |
ε Aql |
|
| Other names |
Deneb el Okab Borealis |
|
ORBITAL ELEMENTS
| Period (P) | 1270.6d (3.48y) | |
Periastron (T) | 41718.5d (1973.097y) | |
Semi-major axis (a) | 12.8m | ± 0.44 |
| Eccentricity (e) | 0.27 | |
Inclination (i) | 87.5° | ± 6.6 |
Longitude of periastron (ω) | 82° | |
| Node (Ω) | 58.7° | ± 3.9 |
Notes | n | |
Reference | Jnc2005 | |
| Equinox | | |
Last observation | 1992 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
56.4 |
0.010 |
| 2001-01-01 |
214.5 |
0.001 |
| 2002-01-01 |
240.6 |
0.012 |
| 2003-01-01 |
47.9 |
0.004 |
| 2004-01-01 |
59.3 |
0.011 |
| 2005-01-01 |
238.4 |
0.012 |
| 2006-01-01 |
246.8 |
0.005 |
| 2007-01-01 |
56.7 |
0.011 |
| 2008-01-01 |
228.3 |
0.002 |
| 2009-01-01 |
240.9 |
0.011 |
| 2010-01-01 |
49.9 |
0.004 |
| 2011-01-01 |
59.6 |
0.010 |
| 2012-01-01 |
238.7 |
0.012 |
| 2013-01-01 |
248.4 |
0.004 |
| 2014-01-01 |
56.9 |
0.011 |
| 2015-01-01 |
232.2 |
0.003 |
| 2016-01-01 |
241.1 |
0.011 |
| 2017-01-01 |
51.3 |
0.005 |
| 2018-01-01 |
59.9 |
0.009 |
| 2019-01-01 |
238.9 |
0.013 |
| 2020-01-01 |
250.5 |
0.003 |
| 2021-01-01 |
57.2 |
0.011 |
| 2022-01-01 |
234.1 |
0.005 |
| 2023-01-01 |
241.4 |
0.010 |
| 2024-01-01 |
52.3 |
0.006 |
| 2025-01-01 |
60.3 |
0.009 |
| 2026-01-01 |
239.0 |
0.013 |
| 2027-01-01 |
253.9 |
0.003 |
| 2028-01-01 |
57.4 |
0.012 |
| 2029-01-01 |
235.2 |
0.006 |
| 2030-01-01 |
241.7 |
0.010 |
|
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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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