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Latest Details
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Name
  U Sgr  
AAVSO UID
000-BCC-568 (2312 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 31 53.33 -19 07 30.3  (277.97221 -19.12508) Search nearby
B1950.0 18 28 56.62 -19 09 42.6
Proper motion
RA: -1.762 +/- 0.070 mas/yDec: -6.161 +/- 0.052 mas/ySource: Gaia DR1
Galactic coord. 13.706 -4.460
Other names

(Internal only)
AAVSO 1826-19 BD-19 5047 CPD-19 6907
HD 170764 HIP 90836 HR 6947
SAO 161571    
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Variability type
DCEP
Spectral type F5Ib-G1.5Ib
Mag. range
6.28 - 7.15 V
Discoverer --
Epoch
03 May 1941 (HJD 2430117.925) Ephemeris
Outburst --
Period 6.745226 d
Rise/eclipse dur. 28%
Remarks
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1 GCVS Team The member of the open cluster M25 (IC 4725). P var. Max = 2416628.046 + 6.744925d*E (JD2404480 - 30115) [A.V.Nielsen, Aarhus Medd N24, 1954.]; since JD2430115 - see Table. [A/H] = 0.1.
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References
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1 E.G.Schmidt, ApJ 165, 335, 1971. 1971ApJ...165..335S
2 A.Sandage, ApJ 131, N3, 610, 1960. 1960ApJ...131..610S
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 = 4.48H = 3.91K = 3.93J - K = 0.55
AllWISE W1 = 3.95W2 = 3.65W3 = 3.95W4 = 3.86W1 - W2 = 0.30W3 - W4 = 0.09
APASS-DR9
Images
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Supporting Documents
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Stellar Association Membership
 IC 4725 Open Cluster 2012A&A...548A..97Z
Revision History
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2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.