16309+0159 STF 2055 AB (Marfik)
16h 30m 54.84s +01° 59' 02.8" P.A. 44.00 sep 1.4 mag 4.15,5.15 Sp A0V+A0V dist. 53.08 pc (173.15 l.y.)
| Coord 2000 |
16309+0159 |
|
Discov num |
STF2055 |
|
Comp |
AB |
|
Coord arcsec 2000 |
16 30 54.84 +01 59 02.8 |
|
| Date first |
1825 |
|
Date last |
2019 |
|
Obs |
803 |
|
| Pa first |
332 |
|
Pa last |
43.6 |
|
P.A. Now (θ) |
47.9° |
|
| Sep first |
0.8 |
|
Sep last |
1.354 |
|
Sep. Now (ρ) |
1.351" |
|
| Mag pri |
4.15 |
|
Mag sec |
5.15 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
A0V+A0V (white/white) |
|
| Pri motion ra |
-021 |
|
Sec motion ra |
-021 |
|
| Pri motion dec |
-088 |
|
Sec motion dec |
-088 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
16309+0159 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Marfik |
121658 |
16 30 55 +01 59 03 |
STF 2055 AB |
2019 |
803 |
44 |
1.4 |
4.15 |
5.15 |
1.00 |
Y |
<=== |
| Show |
Lam Oph |
121658 |
16 30 55 +01 59 03 |
STF 2055 AB,C |
2013 |
10 |
169 |
119.6 |
3.82 |
11.84 |
8.02 |
|
|
| Show |
Marfik |
121658 |
16 30 55 +01 59 03 |
STF 2055 AD |
2020 |
9 |
247 |
308.1 |
4.15 |
10.93 |
6.78 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Marfik |
|
Var name |
NSV7784 Oph |
|
Constellation |
Ophiuchus |
|
SAO |
121658 |
|
| HIP |
80883 |
|
Tycho2 |
0386-02062-1 |
|
Gaia DR2 |
4432032213656434176 |
|
HD |
148857 |
|
| HR |
6149 |
|
GC |
22203 |
|
ADS |
10087 |
|
BD |
BD+02 3118 |
|
| Bayer |
Lambda Ophiuchi |
|
Bayer name |
Lam Oph |
|
Flamsteed |
10 Ophiuchi |
|
Flamsteed name |
10 Oph |
|
| Distance |
53.08 |
|
Distance ly |
173.15 |
|
Bayer greek |
λ Oph |
|
| Other names |
MARSIK, MIRFAK, Marfic |
|
ORBITAL ELEMENTS
| Period (P) | 129.0034y | ± 0.7176 |
Periastron (T) | 1939.4892y | ± 0.1387 |
Semi-major axis (a) | 0.89777a | ± 0.00774 |
| Eccentricity (e) | 0.61536 | ± 0.0051 |
Inclination (i) | 23.761° | ± 1.786 |
Longitude of periastron (ω) | 148.772° | ± 5.235 |
| Node (Ω) | 61.239° | ± 4.938 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
29.0 |
1.408 |
| 2001 |
29.8 |
1.411 |
| 2002 |
30.6 |
1.414 |
| 2003 |
31.4 |
1.416 |
| 2004 |
32.2 |
1.418 |
| 2005 |
33.0 |
1.420 |
| 2006 |
33.8 |
1.420 |
| 2007 |
34.6 |
1.421 |
| 2008 |
35.4 |
1.420 |
| 2009 |
36.2 |
1.420 |
| 2010 |
37.1 |
1.418 |
| 2011 |
37.9 |
1.416 |
| 2012 |
38.7 |
1.414 |
| 2013 |
39.5 |
1.411 |
| 2014 |
40.3 |
1.408 |
| 2015 |
41.1 |
1.404 |
| 2016 |
41.9 |
1.399 |
| 2017 |
42.8 |
1.394 |
| 2018 |
43.6 |
1.388 |
| 2019 |
44.5 |
1.382 |
| 2020 |
45.3 |
1.375 |
| 2021 |
46.2 |
1.368 |
| 2022 |
47.1 |
1.360 |
| 2023 |
47.9 |
1.351 |
| 2024 |
48.8 |
1.342 |
| 2025 |
49.7 |
1.332 |
| 2026 |
50.7 |
1.322 |
| 2027 |
51.6 |
1.311 |
| 2028 |
52.5 |
1.299 |
| 2029 |
53.5 |
1.287 |
| 2030 |
54.5 |
1.274 |
|
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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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