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HD 69311


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MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington
MK spectral classifications are given for 591 stars which are used fortime and latitude observations at Mizusawa and Washington. Theclassifications in the MK system were made by slit spectrograms ofdispersion 73 A/mm at H-gamma which were taken with the 91 cm reflectorat the Okayama Astrophysical Observatory. Photometric observations in UBV were made with the 1-meter reflector at the Flagstaff Station of U.S.Naval Observatory. The spectrum of HD 139216 was found to show a strongabsorption line of H-beta. The following new Am stars were found:HD9550, 25271, 32784, 57245, 71494, and 219109. The following new Apstars were found: HD6116, 143806, 166894, 185171, and 209260. The threestars, HD80492, 116204, and 211376, were found to show the emission inCaII H and K lines.

Star catalogs for the Washington and Richmond photographic zenith tubes.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973AJ.....78..642M&db_key=AST

UBV Photometry of 173 PZT Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971PASP...83..177W&db_key=AST

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观测天体数据

星座:天貓座
右阿森松:08h17m55.40s
赤纬:+38°48'02.9"
视星:7.874
距离:198.413 天文距离
右阿森松适当运动:-7.5
赤纬适当运动:-13
B-T magnitude:9.014
V-T magnitude:7.969

目录:
适当名称   (Edit)
HD 1989HD 69311
TYCHO-2 2000TYC 2974-1483-1
USNO-A2.0USNO-A2 1275-07230959
HIPHIP 40654

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