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Name
  U Sgr  
AAVSO UID
000-BCC-568 (2778 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 31 53.30 -19 07 30.0  (277.97208 -19.12500) Search nearby
B1950.0 18 28 56.58 -19 09 42.6
Galactic coord. 13.706 -4.459
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%  (45.33 h)
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
3 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
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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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5 Otero, Sebastian Alberto 2024-06-12 15:21 UTC Epoch and rise duration from AAVSO data.
4 Fernig, Leo 2022-04-22 13:35 UTC Discoverer updated from 1907AnHar..55....1C page 24
3 Fernig, Leo 2022-04-22 13:34 UTC Discoverer updated from 1907AnHar..55....1C page 22
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.