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HD 181495


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Infrared observations of circumstellar ammonia in OH/IR supergiants
Ammonia has been detected in the circumstellar envelopes of VY CanisMajoris, VX Sagittarii, and IRC +10420 by means of several absorptionlines in the nu-2 vibration-rotation band near 950 kaysers. The lineprofiles are well resolved (0.2 km/sec resolution) and show the gasbeing accelerated to terminal expansion velocities near 30 km/sec. Theobservations reveal a method for determining the position of the centralstar on VLBI maps of OH maser emission to an accuracy of approximately0.2 arcsec. A firm lower limit of 2 x 10 to the 15th/sq cm is obtainedfor the NH3 column density in VY Canis Majoris.

Classification of 831 two-micron sky survey sources south of +5 degrees.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975AJ.....80.1011H&db_key=AST

The Distribution of the BD M-Type Stars Along the Galactic Equator.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1958ApJ...128..510N&db_key=AST

The Distribution of Late M-Type Stars Along the Galactic Equator.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1956ApJ...124..522N&db_key=AST

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Observation and Astrometry data

Constellation:Aquila
Right ascension:19h20m22.18s
Declination:+09°12'57.8"
Apparent magnitude:9.871
Proper motion RA:12.7
Proper motion Dec:-14.4
B-T magnitude:12.237
V-T magnitude:10.067

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 181495
TYCHO-2 2000TYC 1042-481-1
USNO-A2.0USNO-A2 0975-14593540
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