AAVSO Home



Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Details for Revision 2
Log in to retrieve additional aliases from SIMBAD.
Name
  TU Her  
AAVSO UID
000-BBY-694 (12175 observations)  
Constellation
Hercules Sequence
J2000.0
17 13 35.37 +30 42 36.0  (258.39738 +30.71000) Search nearby
B1950.0 17 11 40.53 +30 46 01.7
Galactic coord. 53.405 +33.348
Other names

(Internal only)
1RXS J171337.2+304151 2MASS J17133537+3042360 AAVSO 1709+30
AN 37.1910 BD+30 2950 GSC 02591-00132
Gaia DR3 1333162251022354048 IOMC 2591000035 LAMOST J171335.45+304236.0
LAMOST J171335.67+304236.0 PPM 80041 TIC 9473243
TYC 2591-132-1 UCAC4 604-056203  
(Not logged in)  Add name
Variability type
EA/SD
Spectral type F5
Mag. range
10.88 - 13.7 V
Discoverer --
Epoch
06 Jul 1979 (HJD 2444061.462) Ephemeris
Outburst --
Period 2.2670005 d
Rise/eclipse dur. 14%  (7.617 h)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Mean period 1971-2025 is 2.266956 d.
2 GCVS Team d = 0.022P. P var. Before JD2435000 Min = 2424381.416 + 2.2671303d*E - 854d*10**(-11)*E**2 [B.A.Ustinov, Perem. Zvezdy 7, 254, 1950.]; Min = 2437462.3909 + 2.2669718d*E (JD2435000 - 38000) [I.Todoran, Stud Astr 8, 242, 1963.]; Min = 2443324.70097 + 2.2669385d*E (JD2438000 - 44000) [A.D.Mallama, ApJ Suppl 44, 241, 1980.]; since JD2444000 - 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 Tian, X.; et al., 2023, A New Catalog of Am-type Chemically Peculiar Stars
Based on LAMOST		 2023ApJS..266...14T
2 M.E. Lohr et al., 2015, A&A, 578A, 136 2015A&A...578A.136L
3 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
4 B.A.Ustinov, Perem. Zvezdy 7, 254, 1950. --
5 Dunér, N. C.; Hartwig, E.; Muller, G., 1910, Benennung von neu entdeckten
veränderlichen Sternen		 1910AN....186..273D
6 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.
5 Otero, Sebastian Alberto 2025-08-19 18:24 UTC Period, epoch, eclipse duration and range from AAVSO data. Spectral type from 2023ApJS..266...14T.
4 Fernig, Leo 2022-09-21 20:31 UTC Discoverer updated from 1910AN....186..273D p281
3 Bernhard, Klaus 2015-10-07 23:38 UTC Update from [2015A&A...578A.136L].
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
© 2005-2026 American Association of Variable Star Observers (AAVSO)
Version 1.1 [C]
172.30.2.135