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Name
  alf Ori  
AAVSO UID
000-BBK-383 (51394 observations)  
Constellation
Orion Sequence
J2000.0
05 55 10.30 +07 24 25.0  (88.79292 +7.40694) Search nearby
B1950.0 05 52 27.90 +07 23 58.0
Galactic coord. 199.787 -8.959
Other names

(Internal only)
58 Ori AAVSO 0549+07 ADS 4506 A
BD+07 1055 Betelgeuse GALEX J055510.3+072426
HD 39801 HIP 27989 HR 2061
IRAS 05524+0723 IRC +10100 RAFGL 836
SAO 113271    
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Variability type
SRC
Spectral type M1-M2Ia-Ibe
Mag. range
0 - 1.3 V
Discoverer --
Epoch
--
Outburst --
Period 2335 d  (6.39 y)
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Brightness variations first noticed by J. Herschel in 1836 and reported at the 10 January 1840 meeting of the Royal Astronomical Society (1999JAVSO..27..171W).
2 Billiaert, Bruno Secondary period of ~2100 d. (2016arXiv160205108M)
3 GCVS Team VB A (B 14.5m, 39.8", 110deg). Min = 2410600 + 2070d*E (1840 - 1929) [B.W.Kukarkin, Perem. Zvezdy 3, 67, 1931.]. Since 1929 - see Table. The main variation is superimposed by the waves with P = 200 - 400d. Dust-gaseous shell (r = 50") [R.K.Honeycutt, A.P.Bernat, J.E. Kephart, C.E.Gow, M.T.Sandford II, D.L.Lambert, ApJ 239, 565, 1980.].
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References
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1 E. F. Guinan; R. J. Wasatonic, 2020, ATel #13439 2020ATel13439....1G
2 Kafka, S., 2020, Observations from the AAVSO International Database --
3 E. F. Guinan; R. J. Wasatonic; T. J. Calderwood, 2019, ATel #13365 2019ATel13365....1G
4 Montargès, M.; et al., 2016, The close circumstellar environment of
Betelgeuse. IV. VLTI/PIONIER interferometric monitoring of the photosphere		 2016arXiv160205108M
5 Wilk, S. R., 1999, Further Mythological Evidence for Ancient Knowledge of
Variable Stars		 1999JAVSO..27..171W
6 R.Stothers, K.C.Leung, AsAp 10, 290, 1971. 1971A&A....10..290S
7 W. Ceraski, 1908, Nouvelles de la Science, Variétés 1908BSAFR..22..241C
External Links
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Supporting Documents
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Campaigns/Programs
 Legacy LPV Program
 LPV Program
 SNEWS Campaign
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
8 Otero, Sebastian Alberto 2020-02-04 07:05 UTC Minimum magnitude from 2020ATel13439....1G.
7 Sergey, Ivan 2020-01-19 17:01 UTC Minimum magnitude from AAVSO data.
6 Otero, Sebastian Alberto 2019-12-27 04:55 UTC Spectral type from 2019ATel13365....1G.
5 Schmeer, Patrick 2019-04-27 22:36 UTC Discoverer's given names added. Year of discovery changed.
4 Billiaert, Bruno 2016-02-28 12:37 UTC Period from 2016arXiv160205108M.
3 Billiaert, Bruno 2015-12-29 23:59 UTC discoverer added (1908BSAFR..22..241C)
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.

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