| Coord 2000 | 20120+3454 |
Discov num | SEI 987 |
Comp | Coord arcsec 2000 | 20 12 01.45 +34 54 05.1 |
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| Date first | 1896 |
Date last | 2015 |
Obs | 12 |
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| Pa first | 336 |
Pa last | 336 |
P.A. Now (θ) | 336° |
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| Sep first | 23.7 |
Sep last | 23.2 |
Sep. Now (ρ) | 23.2" |
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| Mag pri | 11.40 |
Mag sec | 12.26 |
delta mag (ΔM) | 0.86 |
Spectral class | A2 (white) |
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| Pri motion ra | +000 |
Sec motion ra | +001 |
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| Pri motion dec | -002 |
Sec motion dec | -002 |
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| Notes | |||||||||||
| Precise pa | 336.1 |
Precise sep | 23.235 |
Constellation | Cygnus |
SAO | 69595 |
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| Tycho2 | 2679-02013-1 |
Gaia DR2 | 2055751912613118208 |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 20120+3454 | SEI 987 | 1998 | 4 | 336 | 23.3 | 11.40 | 12.40 | D | 201201.45+345405.1 | ||
| 20120+3454 | SEI 987 | 2002 | 5 | 336 | 23.3 | 11.40 | 12.40 | D | 201201.45+345405.1 | ||
| 20120+3454 | SEI 987 | 2011 | 6 | 336 | 23.2 | 11.40 | 12.40 | D | 201201.45+345405.1 | ||
| 20120+3454 | SEI 987 | 2015 | 8 | 336 | 23.2 | 11.40 | 12.26 | A2 | 201201.45+345405.1 |