Coord 2000 | 14567-6247 | Discov num | FIN 372 | Comp | Coord arcsec 2000 | 14 56 43.98 -62 46 51.6 | |||||
Date first | 1960 | Date last | 2021 | Obs | 20 | ||||||
Pa first | 96 | Pa last | 280.4 | P.A. Now (θ) | 283.1° | ||||||
Sep first | 0.1 | Sep last | 0.088 | Sep. Now (ρ) | 0.088" | ||||||
Mag pri | 5.90 | Mag sec | 5.90 | delta mag (ΔM) | 0 | Spectral class | B4Vnpe (blue-white) | ||||
Pri motion ra | -012 | Sec motion ra | |||||||||
Pri motion dec | -006 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Name | The Cir | Constellation | Circinus | SAO | 252965 | HIP | 73129 | ||||
Tycho2 | 9024-01862-1 | Gaia DR2 | 5874471485134725632 | HD | 131492 | HR | 5551 | ||||
GC | 20067 | CP | CP-62 4337 | Bayer | Theta Circini | Bayer name | The Cir | ||||
Distance | 462.96 | Distance ly | 1510.18 | Bayer greek | θ Cir |
Period (P) | 39.62y | ± 0.78 | Periastron (T) | 1993.81y | ± 0.12 | Semi-major axis (a) | 0.08564a | ± 0.00056 |
Eccentricity (e) | 0.3041 | ± 0.0081 | Inclination (i) | 153.3° | ± 2 | Longitude of periastron (ω) | 68.6° | ± 6.5 |
Node (Ω) | 228° | ± 5.2 | Notes | n | Reference | Msn2010c | ||
Equinox | 2000 | Last observation | 2009 | Grade | 3 | (1=Definitive, 9=Indet.) |
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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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