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Name
  HP Lyr  
AAVSO UID
000-BCW-316 (586 observations)  
Constellation
Lyra Sequence
J2000.0
19 21 39.07 +39 56 08.3  (290.41279 +39.93564) Search nearby
B1950.0 19 19 57.76 +39 50 22.5
Proper motion
RA: -1.569 +/- 1.022 mas/yDec: -5.743 +/- 0.827 mas/ySource: Gaia DR1
Galactic coord. 72.011 +11.713
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J19213906+3956080 AAVSO 1918+39 AN 165.1935
ASAS J192139+3956.1 GSC 03138-00054 IOMC 3138000053
IRAS 19199+3950 KIC 4831185 KID 4831185
NSVS 5540236 TYC 3138-54-1  
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Variability type
SRD
Spectral type A3Ia-Iab-F2Ib
Mag. range
10.18 - 10.80 V
Discoverer --
Epoch
03 Jul 2009 (HJD 2455016.00) Ephemeris
Outburst --
Period 68.88 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto J-K= 1.13. Post-AGB star. RVA in 2002AcA....52..293G but too early spectral type and small amplitude. Evidence of diferent minima depth in Kepler, ASAS-3, NSVS and their own data is not convincing. Also mean magnitude changes.
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References
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1 Bob Nelson's O-C files, 2016 --
2 W. Wenzel, MVS 13-01, 2013, HP Lyrae - the sudden period decrease --
3 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)
2012arXiv1210.0821A
4 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 [astro-ph]
2008arXiv0808.2558P
5 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 (online data)
2008arXiv0808.2558P
6 J.M. Kreiner, 2004, Acta Astronomica 54, 207 2004AcA....54..207K
7 Graczyk, D. et al., 2002, HP Lyr - Possibly the Hottest RV Tau Type Object 2002AcA....52..293G
8 W.Wenzel, MVS N499-500, 1960. --
9 O.Morgenroth, AN 255, 425, 1935. 1935AN....255..425M
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 8.88H = 8.43K = 7.75J - K = 1.13
AllWISE W1 = 6.16W2 = 4.71W3 = 2.29W4 = 0.83W1 - W2 = 1.45W3 - W4 = 1.45
APASS-DR9 B = 11.12V = 10.38i' = 10.09B - V = 0.75
Images
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Supporting Documents
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2 JD light curves Otero, Sebastian Alberto 2012-07-17 05:08 UTC Light curves with Kepler, ASAS-3, NSVS and Graczyk et al. data.
1 Phase plot Otero, Sebastian Alberto 2012-07-17 05:00 UTC Phase plot with Kepler, NSVS, ASAS-3 and Graczyk et al. data.
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Revision History
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5 Karlsson, Thomas 2015-02-16 12:41 UTC Reference MVS 13-01 added
4 Otero, Sebastian Alberto 2012-07-17 05:00 UTC Type, period, epoch and range from Kepler, ASAS-3, NSVS and Graczyk et al. data.
3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-10-29 21:31 UTC Update from [2004AcA....54..207K].
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.