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Latest Details
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Name
  NSV 20900  
AAVSO UID
--  
Constellation
Ophiuchus Sequence
J2000.0
17 05 47.39 -25 03 00.4  (256.44746 -25.05012) Search nearby
B1950.0 17 02 43.42 -24 58 58.9
Proper motion
RA: -4.2 +/- 5.6 mas/yDec: -2.3 +/- 5.6 mas/ySource: UCAC4
Galactic coord. 358.291 +9.531
Other names

(Internal only)
2MASS J17054739-2503003 ASASSN-V J170547.40-250301.0 ATO J256.4475-25.0501
GSC 06815-00923 Gaia DR2 4112649718198494720 IRAS 17027-2459
OGLE-BLG-LPV-233413 OGLE-IV BLG891.11.5 Terz V 623
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Variability type
M
Spectral type --
Mag. range
14.6 - <19.1 V
Discoverer A. Terzan, Ch. Ounnas
Epoch
12 Feb 2019 (HJD 2458527) Ephemeris
Outburst --
Period 385 d
Rise/eclipse dur. --
Remarks
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1 GCVS Team Var in B and in V.
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References
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1 Iwanek, P.; et al., 2022, The OGLE Collection of Variable Stars: Nearly
66,000 Mira Stars in the Milky Way
2022ApJS..260...46I
2 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive
2019PASP..131a8003M
3 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
4 Terzan, A.; Ounnas, Ch., 1988, A photometric study of the bright cloud B in
Sagittarius. VI. 1592 new variable stars and 30 diffuse objects.
1988A&AS...76..205T
5 A.Terzan, Ch.Ounnas, AsAp Suppl 76, No.2, 205, 1988. 1988A&AS...76..205T
External Links
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Location    Go   
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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 = 8.17H = 7.22K = 6.65J - K = 1.52
AllWISE W1 = 6.46W2 = 5.81W3 = 4.38W4 = 3.20W1 - W2 = 0.65W3 - W4 = 1.19
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 17 05 47.39 -25 03 00.4 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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2 Phase plot Bedient, James 2021-02-04 15:43 UTC Phase plot of NSV 20900 ZTF and ASAS-SN data.
1 Light Curve Bedient, James 2021-02-04 04:49 UTC Light curve of NSV 20900 ZTF and ASAS-SN data from JD 2457458 to 2459028.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2023-02-22 18:15 UTC Period from 2022ApJS..260...46I. Gaia DR3 position.
2 Bedient, James 2020-12-07 10:15 UTC Gaia EDR3 position. Discoverers from 1988A&AS...76..205T. Type, range, period, and epoch from ASAS-SN and ZTF data.
1 Admin, VSX 2005-12-18 01:33 UTC Preserved original object data.