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NGC 2739


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Double galaxy investigations. I - Observations
Redshift information from 240 A/mm spectrograms is presented for 370double arcsec galaxy systems from the Karachentsev (1972) catalog,including all pairs in that catalog with separation less than 80 arcsec.An extensive error discussion utilizing internal and external (21 cm)comparisons provides calibration of systematic error and determines theuncertainty for a typical high weight optical redshift to be plus orminus 65 km/sec. Internal differential redshifts within single spectrausing common lines achieve accuracies of 18-30 km/sec, depending uponseparation, and are available for about 200 pairs. Extensive informationon emission and other properties is also provided.

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Observation and Astrometry data

Constellation:Grande Ourse
Right ascension:09h06m03.10s
Declination:+51°44'40.0"
Aparent dimensions:0.794′ × 0.275′

Catalogs and designations:
Proper Names   (Edit)
NGC 2000.0NGC 2739
HYPERLEDA-IPGC 25530

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