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Name
  DDE 178  
AAVSO UID
000-BNH-158 (No observations)  
Constellation
Cygnus Sequence
J2000.0
20 21 00.93 +37 16 31.8  (305.25387 +37.27550) Search nearby
B1950.0 20 19 08.73 +37 06 56.6
Galactic coord. 75.562 +0.364
Other names

(Internal only)
2MASS J20210094+3716317 3XMM J202101.2+371634 CMC15 J202100.9+371632
IPHAS J202100.93+371631.8 UGPS J202100.93+371631.8 URAT1 637-434724
USNO-A2.0 1200-14953798 USNO-B1.0 1272-0508202  
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Variability type
NL+E
Spectral type --
Mag. range
18.1 - 19.8 g
Discoverer Denis Denisenko, B. Sesar et al.
Epoch
25 May 2018 (HJD 2458263.989) Ephemeris
Outburst --
Period 0.288085 d  (6.9140 h)
Rise/eclipse dur. 18%  (1.24 h)
Remarks
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1 Denisenko, Denis Asymmetric eclipse with a faster fall than rise. Out of eclipse variations by 0.4-0.5m (16.9-17.3 r, 18.1-18.6 g). Gaia DR2 derived M_abs = +6.3.
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References
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1 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive		 2019PASP..131a8003M
2 Sesar, B.; et al., 2017, Machine-learned Identification of RR Lyrae Stars
from Sparse, Multi-band Data: The PS1 Sample		 2017AJ....153..204S
External Links
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Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 21 00.93 +37 16 31.8 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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2 DDE 178 finder chart Denisenko, Denis 2019-10-15 20:15 UTC Color-combined DSS finder chart with 10'x10' FOV
1 DDE 178 phase plot Denisenko, Denis 2019-10-15 20:15 UTC Light curve from ZTF data folded with the best orbital period
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
1 Denisenko, Denis 2019-10-16 04:30 UTC Gaia DR2 position. Type, period and range from ZTF data.

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