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Latest Details
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Name
  26 Vul  
AAVSO UID
000-BCL-955 (1 observation)  
Constellation
Vulpecula Sequence
J2000.0
20 36 08.34 +25 52 57.6  (309.03474 +25.88266) Search nearby
B1950.0 20 33 59.79 +25 42 30.0
Galactic coord. 68.127 -8.868
Other names

(Internal only)
2MASS J20360833+2552574 AG+25 2395 BD+25 4299
GC 28679 GSC 02161-00007 HD 196362
HIP 101641 PMAK V55 PPM 111474
SAO 88884 TIC 243441917 TYC 2161-7-1
UCAC4 580-104781 USNO-A2.0 1125-16461084 USNO-B1.0 1158-0470689
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Variability type
HB+GDOR
Spectral type A5IIIs
Mag. range
6.41 V (0.005)TESS
Discoverer Maksym Pyatnytskyy (PMAK (AAVSO))
Epoch
21 Aug 2019 (HJD 2458717.15) Ephemeris
Outburst --
Period 11.088 d
Rise/eclipse dur. --
Remarks
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1 2021A&A...647A..12K Main GDOR period: 0.3894 d.
2 Pyatnytskyy, Maksym B-V= 0.16 (GCPD), J-K= 0.03. Spectroscopic eccentric binary, e= 0.2843, P1= 11.088 d [1980BICDS..19...71K]. Other period P2= 1.848 d (P1/P2= 6), possible tidally induced pulsations, amplitude <0.001 TESS.
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References
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1 Kolaczek-Szymanski, P. A.; et al., 2021, Massive heartbeat stars from TESS.
I. TESS sectors 1-16		 2021A&A...647A..12K
2 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
3 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
4 Abt, H. A.; Morrell, N. I., 1995, The Relation between Rotational
Velocities and Spectral Peculiarities among A-Type Stars		 1995ApJS...99..135A
5 Kraicheva, Z.; et al., 1980, Catalogue of physical parameters of
spectroscopic binary stars		 1980BICDS..19...71K
External Links
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Location    Go   
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Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 36 08.34 +25 52 57.6 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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3 Phase Plot P= 1.848 d Pyatnytskyy, Maksym 2020-03-22 15:46 UTC Phase plot with TESS data out of main peaks, detrended.
2 Phase Plot P= 11.088 d Pyatnytskyy, Maksym 2020-03-22 15:44 UTC Phase plot with TESS data (Sector 15, BJD > 2458711.3)
1 Light Curve Pyatnytskyy, Maksym 2020-03-22 15:42 UTC Light curve with TESS data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
2 Otero, Sebastian Alberto 2024-06-13 12:24 UTC Type and GDOR period from 2021A&A...647A..12K.
1 Pyatnytskyy, Maksym 2020-03-23 22:45 UTC Initial submission. Mean magnitude from GCPD and HIPPARCOS. Spectral type from 1995ApJS...99..135A.

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