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Latest Details
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Name
  MACHO 304.36408.33  
AAVSO UID
--  
Constellation
Sagittarius Sequence
J2000.0
18 16 34.29 -22 09 13.0  (274.14288 -22.15361) Search nearby
B1950.0 18 13 33.41 -22 10 18.9
Proper motion
RA: -1.0 +/- 6.8 mas/yDec: 1.1 +/- 7.1 mas/ySource: UCAC4
Galactic coord. 9.351 -2.696
Other names

(Internal only)
2MASS J18163428-2209130 AKARI-IRC-V1 J1816343-220912  
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Variability type
L:
Spectral type --
Mag. range
15.0 - 18.0 Rc
Discoverer Klaus Bernhard, Stefan Hümmerich
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Hümmerich, Stefan J-K = 2.270 (2MASS). Investigated in 2005AJ....130.2293Z as a possible RCB star but rejected. Possibly a Mira with a period of ~755 d but MACHO data is insufficient to arrive at a conclusive classification. The phase plot given is based on a period of 755 d.
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References
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1 A. Zaniewski et al., 2005, AJ 130, 2293 2005AJ....130.2293Z
2 R.A. Allsman, T.S. Axelrod, 2001, arXiv:astro-ph/0108444 (MACHO online
data)		 2001astro.ph..8444A
3 R.A. Allsman, T.S. Axelrod, 2001, arXiv:astro-ph/0108444 2001astro.ph..8444A
External Links
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Location    Go   
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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 = 10.87H = 9.37K = 8.60J - K = 2.27
AllWISE W1 = 7.73W2 = 7.38W3 = 6.30W4 = 5.67W1 - W2 = 0.35W3 - W4 = 0.64
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 18 16 34.29 -22 09 13.0 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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1 MACHO 304.36408.33 - lightcurve and phase plot Hümmerich, Stefan 2013-04-19 00:59 UTC Lightcurve and phase plot of MACHO 304.36408.33. The phase plot is based on a period of 755 d (see remarks for more information).
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Revision History
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2 Hümmerich, Stefan 2013-04-13 15:41 UTC Type, period, range and epoch from MACHO Rc photometry. 2MASS position.
1 Admin, VSX 2009-03-11 02:44 UTC Preserved original object data.

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