Coord 2000 | 11239+1032 |
Discov num | STF1536 |
Comp | AB |
Coord arcsec 2000 | 11 23 55.37 +10 31 46.9 |
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Date first | 1827 |
Date last | 2019 |
Obs | 552 |
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Pa first | 95 |
Pa last | 93 |
P.A. Now (θ) | 91.5° |
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Sep first | 3.0 |
Sep last | 2.2 |
Sep. Now (ρ) | 2.24" |
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Mag pri | 4.06 |
Mag sec | 6.71 |
delta mag (ΔM) | 2.65 |
Spectral class | F4IV (yellow-white) |
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Pri motion ra | +153 |
Sec motion ra | +153 |
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Pri motion dec | -065 |
Sec motion dec | -065 |
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Notes |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Tsze tseang | 99587 | 11 23 55 +10 31 47 | STF 1536 AB | 2019 | 552 | 92 | 2.2 | 4.06 | 6.71 | 2.65 | Y | <=== |
Show | 99587 | 11 23 55 +10 31 47 | STF 1536 AB,C | 2015 | 7 | 346 | 332.1 | 4.06 | 11.06 | 7.00 |
Precise pa | 93.1 |
Precise sep | 2.16 |
Common name | Tsze tseang |
Meaning | General seconds |
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Constellation | Leo |
SAO | 99587 |
HIP | 55642 |
Tycho2 | 0858-01221-1 |
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Gaia DR2 | 3915612630249291008 |
HD | 99028 |
HR | 4399 |
GC | 15652 |
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ADS | 8148 |
BD | BD+11 2348 |
Bayer | Iota Leonis |
Bayer name | Iot Leo |
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Flamsteed | 78 Leonis |
Flamsteed name | 78 Leo |
Distance | 23.67 |
Distance ly | 77.21 |
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last precise pa | 93.1 |
last precise sep | 2.16 |
Period (P) | 184.4572y | ± 1.3275 | Periastron (T) | 1948.3626y | ± 0.2117 | Semi-major axis (a) | 1.91525a | ± 0.0155 |
Eccentricity (e) | 0.53689 | ± 0.00459 | Inclination (i) | 127.642° | ± 0.598 | Longitude of periastron (ω) | 142.829° | ± 0.878 |
Node (Ω) | 54.376° | ± 0.846 | Note | Grade | 2 | (1=Definitive, 9=Indet.) | ||
Equinox | Last observation | 2014 |
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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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coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
11239+1032 | STF1536 | AB | 2007 | 508 | 105 | 1.9 | 4.06 | 6.71 | F4IV | NOD | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2010 | 525 | 101 | 2.0 | 4.06 | 6.71 | F4IV | NOD | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2011 | 532 | 101 | 2.0 | 4.06 | 6.71 | F4IV | NOD | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2013 | 534 | 95 | 2.1 | 4.06 | 6.71 | F4IV | NOD | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2014 | 538 | 100 | 1.9 | 4.06 | 6.71 | F4IV | NOD | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2015 | 540 | 99 | 2.0 | 4.06 | 6.71 | F4IV | NO | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2016 | 543 | 96 | 2.2 | 4.06 | 6.71 | F4IV | NO | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2017 | 545 | 97 | 2.1 | 4.06 | 6.71 | F4IV | NO | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2018 | 549 | 96 | 2.2 | 4.06 | 6.71 | F4IV | NO | 112355.37+103146.9 |
11239+1032 | STF1536 | AB | 2019 | 552 | 93 | 2.2 | 4.06 | 6.71 | F4IV | NO | 112355.37+103146.9 |