17053+5428 BU 1088 BC
17h 05m 20.24s +54° 28' 14.1" P.A. 179.00 sep 11.0 mag 5.69,13.70 Sp F7V dist. 27.43 pc (89.48 l.y.)
Coord 2000 |
17053+5428 |
|
Discov num |
BU 1088 |
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Comp |
BC |
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Coord arcsec 2000 |
17 05 20.24 +54 28 14.1 |
|
Date first |
1889 |
|
Date last |
2020 |
|
Obs |
14 |
|
Pa first |
191 |
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Pa last |
178.6 |
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P.A. Now (θ) |
178.6° |
|
Sep first |
12.3 |
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Sep last |
10.98 |
|
Sep. Now (ρ) |
10.98" |
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Mag pri |
5.69 |
|
Mag sec |
13.70 |
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delta mag (ΔM) |
8.01 |
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Spectral class |
F7V (yellow-white) |
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Pri motion ra |
-068 |
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Sec motion ra |
-075 |
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Pri motion dec |
+089 |
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Sec motion dec |
+089 |
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Notes |
N
V
(See Notes, Proper motion indicates physical) |
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rPM=0.06 (< 0.3, Physical double)
This double is physical.
17053+5428 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
Alrakis |
30239 |
17 05 20 +54 28 14 |
STF 2130 AB |
2020 |
831 |
358 |
2.5 |
5.66 |
5.69 |
0.03 |
Y |
|
Show |
|
30239 |
17 05 20 +54 28 14 |
BU 1088 AC |
2015 |
6 |
174 |
12.2 |
5.66 |
13.70 |
8.04 |
|
|
Show |
|
30239 |
17 05 20 +54 28 14 |
BU 1088 BC |
2020 |
14 |
179 |
11.0 |
5.69 |
13.70 |
8.01 |
Y |
<=== |
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Draco |
|
SAO |
30239 |
|
HIP |
83608 |
|
Tycho2 |
3890-01396-1 |
|
Gaia DR2 |
1420101696285626624 |
|
HD |
154905 |
|
HR |
6369 |
|
GC |
23092 |
|
ADS |
10345 |
|
GL |
Wo 9584B |
|
BD |
BD+54 1857 |
|
Bayer |
Mu Draconis |
|
Bayer name |
Mu Dra |
|
Flamsteed |
21 Draconis |
|
Flamsteed name |
21 Dra |
|
Distance |
27.43 |
|
Distance ly |
89.48 |
|
Bayer greek |
μ Dra |
|
SUSPECTED ORBITAL ELEMENTS
Identifier | 17053+5428 STF2130 B |
coord_arcsec_2000 | 170520.24+542814.1 |
Period (P) | 3.2y | |
Periastron (T) | 1915.4y | |
Semi-major axis (a) | 0.026a | |
Eccentricity (e) | 0.4 | |
Inclination (i) | 83.5° | |
Longitude of periastron (ω) | 272.6° | |
Node (Ω) | 134.1° | |
Notes | n | |
Reference | Str1943 | |
Equinox | 1900 | |
Last observation | 1942 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
172.9 |
0.006 |
2001 |
308.8 |
0.023 |
2002 |
129.6 |
0.015 |
2003 |
152.2 |
0.012 |
2004 |
305.4 |
0.020 |
2005 |
66.0 |
0.002 |
2006 |
144.6 |
0.017 |
2007 |
300.0 |
0.015 |
2008 |
319.5 |
0.014 |
2009 |
140.4 |
0.021 |
2010 |
288.3 |
0.009 |
2011 |
314.5 |
0.022 |
2012 |
137.3 |
0.023 |
2013 |
246.0 |
0.004 |
2014 |
311.6 |
0.024 |
2015 |
134.3 |
0.022 |
2016 |
172.9 |
0.006 |
2017 |
308.8 |
0.023 |
2018 |
129.6 |
0.015 |
2019 |
152.2 |
0.012 |
2020 |
305.4 |
0.020 |
2021 |
66.0 |
0.002 |
2022 |
144.6 |
0.017 |
2023 |
300.0 |
0.015 |
2024 |
319.5 |
0.014 |
2025 |
140.4 |
0.021 |
2026 |
288.3 |
0.009 |
2027 |
314.5 |
0.022 |
2028 |
137.3 |
0.023 |
2029 |
246.0 |
0.004 |
2030 |
311.6 |
0.024 |
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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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