22273-6458 CHR 188 Aa,Ab
22h 27m 19.87s -64° 57' 59.0" P.A. 293.00 sep 0.1 mag 5.10,5.40 Sp B9.5V dist. 76.92 pc (250.91 l.y.)
| Coord 2000 |
22273-6458 |
|
Discov num |
CHR 188 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
22 27 19.87 -64 57 59.0 |
|
| Date first |
1992 |
|
Date last |
2021 |
|
Obs |
14 |
|
| Pa first |
251 |
|
Pa last |
293.2 |
|
P.A. Now (θ) |
345.4° |
|
| Sep first |
0.0 |
|
Sep last |
0.081 |
|
Sep. Now (ρ) |
0.041" |
|
| Mag pri |
5.10 |
|
Mag sec |
5.40 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
B9.5V (blue-white) |
|
| Pri motion ra |
+060 |
|
Sec motion ra |
|
|
| Pri motion dec |
+009 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
22273-6458 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
255222 |
22 27 20 -64 57 59 |
CHR 188 Aa,Ab |
2021 |
14 |
293 |
0.1 |
5.10 |
5.40 |
0.30 |
Y |
<=== |
| Show |
Del Tuc |
255222 |
22 27 20 -64 57 59 |
HJ 5334 AB |
2016 |
23 |
279 |
6.8 |
4.49 |
8.73 |
4.24 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
NSV14158 Tuc |
|
Constellation |
Tucana |
|
SAO |
255222 |
|
HIP |
110838 |
|
| Tycho2 |
9120-01918-1 |
|
Gaia DR2 |
6404338508023617664 |
|
HD |
212581 |
|
HR |
8540 |
|
| GC |
31346 |
|
CP |
CP-65 4044 |
|
Bayer |
Delta Tucanae |
|
Bayer name |
Del Tuc |
|
| Distance |
76.92 |
|
Distance ly |
250.91 |
|
Bayer greek |
δ Tuc |
|
ORBITAL ELEMENTS
| Period (P) | 3.975y | |
Periastron (T) | 2015.721y | |
Semi-major axis (a) | 0.053a | |
| Eccentricity (e) | 0.594 | |
Inclination (i) | 43.5° | |
Longitude of periastron (ω) | 205.7° | |
| Node (Ω) | 274.9° | |
Notes | n | |
Reference | Tok2018e | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
187.5 |
0.020 |
| 2001 |
275.2 |
0.074 |
| 2002 |
298.6 |
0.078 |
| 2003 |
335.9 |
0.047 |
| 2004 |
196.2 |
0.021 |
| 2005 |
275.9 |
0.075 |
| 2006 |
299.2 |
0.078 |
| 2007 |
337.6 |
0.046 |
| 2008 |
203.9 |
0.023 |
| 2009 |
276.5 |
0.075 |
| 2010 |
299.8 |
0.078 |
| 2011 |
339.4 |
0.045 |
| 2012 |
210.5 |
0.024 |
| 2013 |
277.2 |
0.076 |
| 2014 |
300.5 |
0.077 |
| 2015 |
341.3 |
0.044 |
| 2016 |
216.3 |
0.026 |
| 2017 |
277.8 |
0.076 |
| 2018 |
301.1 |
0.077 |
| 2019 |
343.3 |
0.043 |
| 2020 |
221.4 |
0.028 |
| 2021 |
278.4 |
0.077 |
| 2022 |
301.7 |
0.076 |
| 2023 |
345.4 |
0.041 |
| 2024 |
225.8 |
0.030 |
| 2025 |
279.1 |
0.077 |
| 2026 |
302.4 |
0.076 |
| 2027 |
347.6 |
0.040 |
| 2028 |
229.8 |
0.032 |
| 2029 |
279.7 |
0.078 |
| 2030 |
303.0 |
0.075 |
|
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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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