| Coord 2000 | 19549+5049 |
Discov num | HU 687 |
Comp | Coord arcsec 2000 | 19 54 56.19 +50 49 11.9 |
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| Date first | 1904 |
Date last | 2008 |
Obs | 45 |
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| Pa first | 93 |
Pa last | 27 |
P.A. Now (θ) | 42.8° |
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| Sep first | 0.2 |
Sep last | 0.2 |
Sep. Now (ρ) | 0.2" |
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| Mag pri | 8.54 |
Mag sec | 8.63 |
delta mag (ΔM) | 0.09 |
Spectral class | A0 (white) |
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| Pri motion ra | +005 |
Sec motion ra | |||||||||
| Pri motion dec | +025 |
Sec motion dec | |||||||||
| Notes | |||||||||||
| Precise pa | 26.9 |
Precise sep | 0.196 |
Constellation | Cygnus |
SAO | 32104 |
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| HIP | 97997 |
Tycho2 | 3570-00245-1 |
Gaia DR2 | 2088834258965337216 |
HD | 188871 |
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| ADS | 13135 |
BD | BD+50 2920 |
Distance | 256.41 |
Distance ly | 836.41 |
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| last precise pa | 26.9 |
last precise sep | 0.196 |
| Period (P) | 154.6y | Periastron (T) | 1960.63y | Semi-major axis (a) | 0.159a | |||
| Eccentricity (e) | 0.321 | Inclination (i) | 36.2° | Longitude of periastron (ω) | 218.9° | |||
| Node (Ω) | 28.9° | Note | Grade | 3 | (1=Definitive, 9=Indet.) | |||
| Equinox | 2000 | Last observation | 2008 |
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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 |
| 19549+5049 | HU 687 | 2001 | 41 | 20 | 0.2 | 8.54 | 8.63 | A0 | NOD | 195456.19+504911.9 | |
| 19549+5049 | HU 687 | 2006 | 42 | 25 | 0.2 | 8.54 | 8.63 | A0 | NOD | 195456.19+504911.9 | |
| 19549+5049 | HU 687 | 2008 | 43 | 27 | 0.2 | 8.54 | 8.63 | A0 | NOD | 195456.19+504911.9 |