Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Latest Details
Log in to retrieve additional aliases from SIMBAD.
  RR Tel  
000-BCK-377 (8328 observations)  
Telescopium Sequence
20 04 18.54 -55 43 33.2  (301.07725 -55.72589) Search nearby
B1950.0 20 00 20.18 -55 52 02.9
Proper motion
RA: 0.290 +/- 0.829 mas/yDec: -3.284 +/- 1.513 mas/ySource: Gaia DR1
Galactic coord. 342.163 -32.242
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1956-56 AN 166.1908 Downes RR Tel
HV 3181 Hen 3-1811  
(Not logged in)  Add name
Variability type
Spectral type pec
Mag. range
6.5 - 16.5 p
Discoverer Fleming, Kirchoff, de Kock
Outburst 1944
Period --
Rise/eclipse dur. --
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team During 1889 - 1930 12m - 14m pg (according to [M.W.Mayall, HB N919, 1949.], irregular variations; according to [C.H.Payne, HB N861, 1928.], Max = 2411490 + 384d*E, with irregularities). During 1930 - 1944 12.5m - 16.5m pg, Max = 2430145 + 386.73d*E [C.Payne-Gaposchkin, HA 113, N4, 1954.]; after 1938 an increase of mean brightness and of the amplitude was noted. An outburst from 14m to 7m in October, 1944. In Max, 6.5m - 7.5m pg, during JD2431500 - 33000; after JD2433100 began to decline its mean brightness. Near the Max of the outburst no periodic variations was noted. During JD2441426 - 44899 5.06m - 6.74m J, P = 387d [M.W.Feast, P.A.Whitelock, R.M. Catchpole, G.Roberts, B.S.Carter, MN 202, N3, 951, 1983.], M - m = 0.5P; Min (V) = 2442551 + 374.2d*E (1961 - 1981), Delta(V) = 0.25m for periodic changes [S.J.Kenyon, F.M.Bateson, PASP 96, 321, 1984.]; 9.8m - 10.7m B, P = 395d (JD2443500 - 45500) [A.Heck, J.Manfroid, AsAp 142, N2, 341, 1985.]. In the Max of the outburst the spectrum was F5 without emissions. During the brightness decline a rich emission spectrum was formed with lines of hydrogen, forbidden lines of metals in high stages of ionization, etc. Since the 1970-ies TiO absorption bands are being noted. Radio source, soft X-ray source.
(Not logged in)  Add remark
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 R.A.Downes, 2001, PASP 113, 764 (2006 archival) 2005JAD....11....2D
2 R.A.Downes, 2001, PASP 113, 764 2001PASP..113..764D
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.
Please review Digitized Sky Survey Acknowledgment and Copyright.
Image not downloaded. Click Retrieve Image to download and view. Retrieve image
Supporting Documents
There are currently no supporting documents on file for this star. (Not logged in)  Add document
 Legacy CVs
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 15:52 UTC Discoverer added.
1 Admin, VSX 2005-12-17 20:33 UTC Initial database population.