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Latest Details
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Name
  PMAK V54  
AAVSO UID
000-BNL-368 (No observations)  
Constellation
Cygnus Sequence
J2000.0
20 12 01.93 +34 28 44.1  (303.00804 +34.47892) Search nearby
B1950.0 20 10 06.68 +34 19 41.6
Galactic coord. 72.227 +0.311
Other names

(Internal only)
2MASS J20120193+3428442 ADS 13508 AG+34 1991
BD+34 3908A CCDM J20120+3429A GSC 02679-01494
HD 192124 HIP 99532 IDS 20082+3411 A
PPM 84417 SAO 69588 TIC 92774987
TYC 2679-1494-1 UCAC4 623-096316 USNO-A2.0 1200-14667784
USNO-B1.0 1244-0398845 WDS J20120+3429A  
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Variability type
EA
Spectral type kA3hA7mF0
Mag. range
7.90 V (0.79)TESS
Discoverer Maksym Pyatnytskyy (PMAK (AAVSO))
Epoch
17 Aug 2019 (HJD 2458712.66) Ephemeris
Outburst --
Period 24.2376 d
Rise/eclipse dur. 1.5%  (0.36 d)
Remarks
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1 Pyatnytskyy, Maksym V= 7.25 (GCPD, HIPPARCOS), B-V= 0.22 (GCPD), J-K= 0.05 (2MASS) for AB. Visual multiple star, separation 0.3” between A and B, 24” between A and C, 42” between A and D. The brightest component (V= 7.90) shows eclipses. TESS magnitudes contaminated by B (V= 8.12), C (V= 12.05) and D (V= 13.3). Min II at a phase 0.705, amplitude 0.71 TESS (corrected). Amplitude in the table has been corrected and is approximate.
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References
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1 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
2 Mason, B. D.; et al., 2001, The 2001 US Naval Observatory Double Star
CD-ROM. I. The Washington Double Star Catalog
2001AJ....122.3466M
3 Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues 1997HIP...C......0E
4 Abt, H. A., 1985, Visual multiples. VIII. 1000 MK types 1985ApJS...59...95A
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Images
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Supporting Documents
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2 Phase Plot Pyatnytskyy, Maksym 2020-03-13 18:25 UTC Phase plot with TESS and HIPPARCOS data.
1 Light Curve Pyatnytskyy, Maksym 2020-03-12 17:26 UTC Light curve with TESS data.
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Revision History
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1 Pyatnytskyy, Maksym 2020-03-13 20:12 UTC Initial submission. Mean magnitude of A from WDS, HIPPARCOS, and GCPD data. Spectral type of AB from 1985ApJS...59...95A. Coordinates from HIPPARCOS.