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HD 73884


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The Perkins catalog of revised MK types for the cooler stars
A catalog is presented listing the spectral types of the G, K, M, and Sstars that have been classified at the Perkins Observatory in therevised MK system. Extensive comparisons have been made to ensureconsistency between the MK spectral types of stars in the Northern andSouthern Hemispheres. Different classification spectrograms have beengradually improved in spite of some inherent limitations. In thecatalog, the full subclasses used are the following: G0, G5, G8, K0, K1,K2, K3, K4, K5, M0, M1, M2, M3, M4, M5, M6, M7, and M8. Theirregularities are the price paid for keeping the general scheme of theoriginal Henry Draper classification.

A list of MK standard stars
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1988 Revised MK Spectral Standards for Stars GO and Later
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1985 revised MK spectral standards : stars GO and later
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Revised MK Spectral Standard Stars Later than G0
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Some Variable Stars in the SRS Catalogue
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Revised MK spectral types for G, K, and M stars
A catalog of spectral types of 552 G, K, and M stars is presented, whichis classified on the revised MK system. Stellar representatives of thehalo, disk, and arm populations in all parts of the sky are included.Photoelectric V magnitudes are given, as are intensity estimates of anyfeatures which make the spectrum appear peculiar as compared to thespectrum of a similar normal star. Abundance indices are also providedin the following lines or bands: CN, barium, Fe, calcium, and CH.

A photoelectric measurement of magnesium for late-type stars
A photoelectric index of MgH + Mg b for late-type stars has been createdby the addition of one filter bandpass to the DDO system. Measurementsshow that this index has good sensitivity to surface gravity for Kstars, and suggest that it can differentiate metal-poor halo giants fromdisk stars. From this index, involving measurement through two filtersalone, it appears that membership can be determined for stars on thegiant branch of globular clusters. It is possible that the index couldbe used, after calibration with cluster giants, to determine ages ofgiant stars in the field.

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Observation and Astrometry data

Constellation:ほ座
Right ascension:08h38m43.31s
Declination:-47°47'16.3"
Apparent magnitude:7.888
Distance:934.579 parsecs
Proper motion RA:-2.4
Proper motion Dec:5.8
B-T magnitude:10.439
V-T magnitude:8.099

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 73884
TYCHO-2 2000TYC 8155-2896-1
USNO-A2.0USNO-A2 0375-06191018
HIPHIP 42399

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