AAVSO Home



Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Details for Revision 4
Log in to retrieve additional aliases from SIMBAD.
Name
  W Sgr  
AAVSO UID
000-BCW-976 (7145 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 05 01.22 -29 34 48.3  (271.25508 -29.58008) Search nearby
B1950.0 18 01 49.57 -29 35 03.3
Galactic coord. 1.576 -3.980
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1758-29 ADS 11029 A CD-29 14447
CPD-29 5230 HAT 622-9818 HD 164975
HIP 88567 HR 6742 IRC -30351
OGLE-BLG-CEP-26 SAO 186237  
(Not logged in)  Add name
Variability type
DCEP
Spectral type F4-G2Ib
Mag. range
4.28 - 5.10 V
Discoverer Johann Schmidt (1866)
Epoch
01 Jan 1991 (HJD 2448257.806) Ephemeris
Outburst --
Period 7.594984 d
Rise/eclipse dur. 32%  (58.33 h)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Billiaert, Bruno Triple system. Spectroscopic binary (F5:V companion, 5 AU from the cepheid) and a 9.7 Vmag. A0V companion 0.16" away (2009AJ....137.3700E). Combined range given.
2 GCVS Team VB A (A 9.2m, 0.116", 153.3deg, 1976.477; B 13.5m, 33.4", 233deg; C 13.5m, 47.9", 101deg). P var. Max = 2403198.39 + 7.594695d*E (JD2403100 - 34500); since JD2434500 - see Table.
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Breitfelder, J.; et al., 2016, Observational calibration of the projection
factor of Cepheids. II. Application to nine Cepheids with HST/FGS parallax
measurements		 2016arXiv160104727B
2 I. Soszynski et al., 2011, arXiv:1112.1406v1 (online I data) 2011arXiv1112.1406S
3 I. Soszynski et al., 2011, arXiv:1112.1406v1 (online V data) 2011arXiv1112.1406S
4 I. Soszynski et al., 2011, arXiv:1112.1406v1 (Chart) 2011arXiv1112.1406S
5 I. Soszynski et al., 2011, arXiv:1112.1406v1 [astro-ph.SR] 2011arXiv1112.1406S
6 D.M. Nataf, K.Z. Stanek, G.A. Bakos, 2010, arXiv:1009.2502v1 [astro-ph.GA] 2010arXiv1009.2502N
7 Evans, N. R.; Massa, D.; Proffitt, C., 2009, Massive Star Multiplicity: The
Cepheid W Sgr		 2009AJ....137.3700E
8 H.H.Swope, HA 109, N1, 1940. 1940AnHar.109....1S
9 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
10 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.		 --
External Links
Links open in a new window. Not all links may be valid for this particular target.
Location    Go   
Select a Location for more details.
Supporting Documents
There are currently no supporting documents on file for this star. (Not logged in)  Add document
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2024-06-12 14:38 UTC Epoch and rise duration from AAVSO data.
5 Fernig, Leo 2022-04-22 13:35 UTC Discoverer updated from 1907AnHar..55....1C page 24
4 Fernig, Leo 2022-04-22 13:34 UTC Discoverer updated from 1907AnHar..55....1C page 22
3 Billiaert, Bruno 2016-02-03 23:09 UTC Period and epoch from 2016arXiv160104727B. Range from HIPPARCOS and GCPD data.
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.

Guidelines    FAQ    Manual    Forum    Variability Types    Passbands    Copyright    Acknowledgments    Privacy    Contact    Help us   
The International Variable Star Index
© 2005-2025 American Association of Variable Star Observers (AAVSO)
Version 1.1 [C]
172.30.2.216