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Latest Details
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Name
  CH Del  
AAVSO UID
000-BDQ-111 (3 observations)  
Constellation
Delphinus Sequence
J2000.0
20 23 18.39 +17 06 13.5  (305.82663 +17.10376) Search nearby
B1950.0 20 21 01.29 +16 56 30.3
Proper motion
RA: 7.6 +/- 9.0 mas/yDec: 13.6 +/- 8.5 mas/ySource: UCAC4
Galactic coord. 59.068 -11.409
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J20231838+1706134 AN 142.1930 ASAS J202318+1706.3
ASASSN-V J202318.40+170613.5 GSC 01635-01484  
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Variability type
RRC
Spectral type --
Mag. range
12.88 - 13.36 V
Discoverer --
Epoch
16 Sep 2003 (HJD 2452898.59) Ephemeris
Outburst --
Period 0.315032 d  (7.5608 h)
Rise/eclipse dur. 41%  (3.10 h)
Remarks
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1 GCVS Team [Fe/H] = -1.23. According to [E.Kemper, AJ 87, 1395, 1982.], P = 0.315D.
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References
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1 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties
2018A&A...616A...1G
2 D.M. Bramich, K.A. Alsubai, A. Arellano Ferro et al., 2014, IBVS 6106 2014IBVS.6106....1B
3 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
4 C.Hoffmeister, VSS 1, N2, 1947. --
5 C.Hoffmeister, Sonn Mitt N22, 1933. 1933MiSon..22....1H
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 = 12.09H = 11.97K = 11.93J - K = 0.17
AllWISE W1 = 11.83W2 = 11.88W3 = 11.42W1 - W2 = -0.06
APASS-DR9 B = 13.41V = 13.02g' = 13.18r' = 12.95i' = 12.90B - V = 0.39
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 23 18.39 +17 06 13.5 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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1 Lightcurve plot Quadri, Ulisse 2016-08-09 11:36 UTC Lightcurve from VESPA project at (IAU Station 565) Bassano Bresciano Observatory, BS, Italy.
http://www.osservatoriobassano.org
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Otero, Sebastian Alberto 2020-05-15 00:48 UTC Gaia DR2 position.
4 Quadri, Ulisse 2016-08-06 18:25 UTC Period, range and rise duration from Bassano Bresciano Observatory (Italy) and ASAS-3 data.
3 Otero, Sebastian Alberto 2011-04-09 00:57 UTC Primary record creation. Period, epoch and range from ASAS-3 data. UCAC3 position.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.