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HD 11660


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Planetary nebulae with close binary central stars
The observational record concerning planetary nebulae with close binarynuclei is surveyed, in light of a model for the formation of suchnebulae which predicts a characteristic, nonspherical morphology.Although agreement is found between the morphological prediction of themodel and the observed shapes of M2-9, NGC 6164-5, and MZ 3, cases arefound in which different observations yield different results withrespect to central star variability.

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Observation and Astrometry data

Constellation:Aries
Right ascension:01h54m46.57s
Declination:+17°33'08.9"
Apparent magnitude:8.474
Distance:413.223 parsecs
Proper motion RA:-2.4
Proper motion Dec:6.4
B-T magnitude:8.816
V-T magnitude:8.503

Catalogs and designations:
Proper Names
HD 1989HD 11660
TYCHO-2 2000TYC 1209-1404-1
USNO-A2.0USNO-A2 1050-00522942
HIPHIP 8915

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