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Name
  RR Tel  
AAVSO UID
000-BCK-377 (8388 observations)  
Constellation
Telescopium Sequence
J2000.0
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  
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Variability type
NC
Spectral type pec
Mag. range
6.5 - 16.5 p
Discoverer Fleming, Kirchoff, de Kock
Epoch
--
Outburst 1944
Period --
Rise/eclipse dur. --
Remarks
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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.
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References
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1 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
2 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
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 = 7.30H = 6.08K = 4.90J - K = 2.40
AllWISE W1 = 3.41W3 = 0.41W4 = -0.62W3 - W4 = 1.03
APASS-DR9 B = 12.13V = 11.80g' = 11.76r' = 11.45i' = 11.91B - V = 0.33
GALEX-DR5 FUV = 12.43NUV = 13.23FUV - NUV = -0.80
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 04 18.54 -55 43 33.2 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Campaigns/Programs
 Legacy CVs
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2007-03-23 19:52 UTC Discoverer added.
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.

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