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Latest Details
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Name
  Pismis 24 1  
AAVSO UID
--  
Constellation
Scorpius Sequence
J2000.0
17 24 43.49 -34 11 57.0  (261.18121 -34.19917) Search nearby
B1950.0 17 21 25.00 -34 09 16.4
Proper motion
RA: -3.1 +/- 1.9 mas/yDec: 3.5 +/- 3.7 mas/ySource: UCAC4
Galactic coord. 353.168 +0.895
Other names

(Internal only)
1RXS J172446.8-341224 2MASS J17244349-3411570 ALS 4142
ASAS J172443-3412.0 CD-34 11671 GSC 07383-00007
HDE 319718 LS 4142 Pismis 24-1
TYC 7383-7-1 [HHR2012] J172443.5-341157  
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Variability type
EA
Spectral type O3.5If*+O4III(f+)
Mag. range
10.39 - 10.46 V
Discoverer --
Epoch
07 Jul 2004 (HJD 2453193.755) Ephemeris
Outburst --
Period 2.35917 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Spectral type for the components of the AB pair (2007ApJ...660.1480M). ASAS-3 magnitudes contaminated by Pismis 24 16 (V= 13.02; O7.5V; sep. 12"), Pismis 24 18 (V= 13.97; B0.5V; sep. 15"), Pismis 24 17 (V= 11.84, O3.5III(f*); sep. 16"), Pismis 24 19 (V= 14.43; B1V; sep. 16") and Pismis 24 12 (V= 13.88; B1V; sep. 21"). Range has been corrected and corresponds to the combined brightness of the AB pair.
2 2013arXiv1306.5730B Two components separated by 0.36" of which one is the variable.
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References
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1 A. Barr Dominguez, R. Chini, F. Pozo Nunez et al., 2013, arXiv:1306.5730
[astro-ph.EP]
2013arXiv1306.5730B
2 M. Haas, M. Hackstein, M. Ramolla, H. Drass, R. Watermann, R. Lemke, R.
Chini, 2012, AN 333, 706
2012AN....333..706H
3 Maíz Apellániz, J.; et al., 2007, Pismis 24-1: the stellar upper mass limit
preserved
2007ApJ...660.1480M
4 Pojmanski, G., 2002, The All Sky Automated Survey 2002AcA....52..397P
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 = 6.73H = 6.17K = 5.89J - K = 0.83
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2016-04-03 02:14 UTC Phase plot with ASAS-3 data.
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Revision History
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2 Otero, Sebastian Alberto 2016-04-03 02:14 UTC Spectral type from 2007ApJ...660.1480M. Period, epoch and range from ASAS-3 data. UCAC4 position.
1 Admin, VSX 2013-06-26 20:33 UTC Preserved original object data.