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HD 183518


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Maximum separations among cataloged binaries
The paper classifies many of the widest common-motion binaries listed inthe Aitken catalog and list 72 physical pairs with known photoelectricphotometry, 31 physical pairs without good photometry, and 27 opticalpairs. As a function of primary types, the physical systems have upperlimits to their separations that are exceeded by some of the opticalpairs. The fact that optical pairs occur with larger separations impliesthat the limits are real ones and not just catalog limitations. Thoselimits (in AU) are expressed by 2500 M1 exp 1.54 for B5-KO main-sequenceprimaries. The same limits hold for the Trapezium and hierarchicalsystems studied previously.

Visual multiples. VIII - 1000 MK types
A total of 1000 new classifications are given for stars brighter than B= 8.0 mag in the Aitken double star catalog. The classificationssupplement 865 classifications obtained in 1981 and 1984. Among thenewly discovered stars are 12 new Ap stars, eight Lambda Bootis stars,one Ba II star, and 60 Am stars. A detailed list of the newclassifications is given.

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Osservazione e dati astrometrici

Costellazione:Aquila
Ascensione retta:19h30m04.70s
Declinazione:-00°26'41.9"
Magnitudine apparente:7.348
Distanza:105.597 parsec
Moto proprio RA:5.7
Moto proprio Dec:-8.2
B-T magnitude:7.604
V-T magnitude:7.37

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 183518
TYCHO-2 2000TYC 5144-3102-1
USNO-A2.0USNO-A2 0825-16021517
HIPHIP 95886

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