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Latest Details
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| Name |
HP Dra |
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| AAVSO UID |
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000-BDQ-447 (No observations) |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
18 53 40.63 +51 14 30.4 |
| Proper motion |
| RA: 23.463 +/- 0.060 mas/y | Dec: 83.304 +/- 0.062 mas/y | Source: Gaia DR1 |
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| Galactic coord. |
81.126 +20.336 |
Other names
(Internal only)
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BD+51 2459 |
HD 175900 |
HIP 92835 |
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SAO 31262 |
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(Not logged in) Add name
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| Variability type |
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EA+ROT |
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| Spectral type |
F9V+F9V |
| Mag. range |
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7.96 - 8.24 V |
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| Discoverer |
Hipparcos |
| Epoch |
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| Outburst |
-- |
| Period |
10.76154354 d |
| Rise/eclipse dur. |
2.45% (0.263658 d) |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
Otero, Sebastian Alberto
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Eccentric system. e= 0.036. Min II= 8.21 V at phase 0.518, duration 2.52%. Also rotational variability with P= 11.0-11.5 d. Gaia DR2 2144465183642117888 is a white-dwarf companion to HP Dra, with a common proper motion and an angular distance of 14.4". (2025Obs...145..167S) |
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2 |
Admin, VSX
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Min II amplitude 0.26V at phase 0.518. |
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(Not logged in) Add remark
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References
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Click reference title/citation to view in new window. Roll over index number to view submission details.
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1 |
Southworth, J., 2025, Rediscussion of Eclipsing Binaries. Paper 26: The
F-Type Long-Period System HP Draconis |
2025Obs...145..167S |
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2 |
M. Kurpinska-Winiarska, E. Oblak, M. Winiarski, T. Kundera, 2000, IBVS 4823 |
2000IBVS.4823....1K |
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3 |
European Space Agency, 1997, The Hipparcos and Tycho Catalogues, ESA
SP-1200 |
1997yCat.1239....0E |
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 6.85 | H = 6.62 | K = 6.57 | J - K = 0.29 |
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AllWISE
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W1 = 6.55 | W2 = 6.52 | W3 = 6.59 | W4 = 6.52 | W1 - W2 = 0.03 | W3 - W4 = 0.07 |
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APASS-DR9
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B = 8.85 | V = 7.96 | g' = 8.28 | r' = 7.78 | i' = 7.71 | B - V = 0.90 |
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Images
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Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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There are currently no supporting documents on file for this star.
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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5 |
Otero, Sebastian Alberto
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2026-03-21 20:23 UTC |
Type, period, epoch, eclipse duration and spectral types from 2025Obs...145..167S. Range derived from Hipparcos, GCPD and TESS data. |
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4 |
Admin, VSX
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2010-01-05 04:43 UTC |
Position updated from the GCVS version of November 2009. |
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3 |
Admin, VSX
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2008-12-27 01:29 UTC |
Update from [2000IBVS.4823....1K]. |
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2 |
Admin, VSX
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2007-03-23 19:53 UTC |
Added period, epoch and spectral type from [1997yCat.1239....0E]. |
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1 |
Admin, VSX
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2005-12-18 01:33 UTC |
Initial database population. |
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