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Name
  NSV 21498  
AAVSO UID
--  
Constellation
Ophiuchus Sequence
J2000.0
17 20 20.04 -26 29 30.5  (260.08350 -26.49181) Search nearby
B1950.0 17 17 13.63 -26 26 30.5
Proper motion
RA: -12.8 +/- 3.8 mas/yDec: -13.5 +/- 2.9 mas/ySource: UCAC4
Galactic coord. 359.010 +6.025
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J17202003-2629305 ASASSN-V J172019.96-262930.5 ASASSN-V J172020.11-262909.2
ASASSN-V J172020.17-262908.6 Gaia DR3 4108378115560771840 OGLE BLG972.21.221
OGLE-BLG-T2CEP-1163 Terz V 1163 UCAC4 318-119066
USNO-A2.0 0600-26114856    
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Variability type
DCEP
Spectral type --
Mag. range
15.0 - 16.4 V
Discoverer A. Terzan, Ch. Ounnas
Epoch
04 Apr 2017 (HJD 2457847.845) Ephemeris
Outburst --
Period 3.72287 d
Rise/eclipse dur. 20%  (17.9 h)
Remarks
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1 Otero, Sebastian Alberto ASAS-SN magnitudes contaminated by nearby stars. Range has been corrected.
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References
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1 Gaia collaboration; et al., 2022, Gaia Data Release 3 (Gaia DR3) Part 1
Main source
2022yCat.1355....0G
2 Inno, L.; et al., 2021, The Gaia-ASAS-SN Classical Cepheid Sample. I.
Sample Selection
2021ApJ...914..127I
3 Soszyński, I.; et al., 2020, Additional Galactic Cepheids from the
OGLE Survey
2020AcA....70..101S
4 T. Jayasinghe, K. Z. Stanek, C. Kochanek, et al., 2019 (in preparation) --
5 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
6 A.Terzan, Ch.Ounnas, AsAp Suppl 76, No.2, 205, 1988. 1988A&AS...76..205T
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 = 12.96H = 12.63K = 12.48J - K = 0.48
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2024-05-29 22:05 UTC Phase plot with ASAS-SN data.
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Revision History
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2 Otero, Sebastian Alberto 2024-05-29 19:50 UTC Type from 2021ApJ...914..127I. Period, epoch, rise duration and range from ASAS-SN and Gaia DR3 data.
1 Admin, VSX 2005-12-18 01:33 UTC Preserved original object data.