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HD 185378


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Detection of red supergiant stars on the colour-colour diagrams in the system UBVRI.
Not Available

Photometry of Stars in the Field of V345 and V553 Aquilae
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UBV(RI)c photometry of equatorial standard stars - A direct comparison between the northern and southern systems
UBV(RI)c photometry of 212 stars from Landolt's list of equatorialstandards is presented. The observations are tied to the system definedby Cousin's E-region standards. A comparison of the present results withLandolt's reveals reasonably good agreement for (V-R)c and (V-I)c, butmarked systematic differences for (B-V) and (U-B). The UBV systems ofCousins and Landolt are evidently not the same and both probably differfrom Johnson's original system.

Photoelectric observations of classical cepheids.
Not Available

UBVRI photometric standard stars around the celestial equator
It is pointed out that accurate, internally consistent, and readilyaccessible standard star photometric sequences are necessary for thecalibration of the intensity and color data which astronomers obtain atthe telescope. The photometric results provided in connection with thepresent study represent the first part of an effort which is concernedwith the presentation of UBVRI photoelectric photometric standard starsin the magnitude range from 7 to 17 over as broad a range in color aspossible. All of the photometric observations were made with a 31034type photomultiplier used in a pulse counting mode. Some 15 to 25standard stars chosen from Cousins' lists (1973, 1976) in the E-regionswere observed with an 0.4-m telescope each night along with the programstars. UBVRI standard stars were observed periodically throughout thenight. Observations with a 0.9-m telescope were also conducted. TheUBVRI photoelectric observations take into account 223 stars.

Spectral classifications for Landolt's celestial equatorial standard stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979AJ.....84..783D&db_key=AST

Equatorial UBVRI photoelectric sequences
From 1335 BVRI observations of 189 stars in selected areas 92-115,Landolt's (1973) network of faint UBV standards has been extended to RI. Of these stars, 173 have four or more observations. The (U-B) valuesof Landolt are adopted, and a well-observed equatorial faint-starnetwork is presented on the Johnson UBVRI photometric system.

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Besorolás csoportokba:

Pozíciós és asztrometriai adatok

Csillagkép:Vízöntő
Rektaszcenzió:19h38m47.15s
Deklináció:+00°36'20.4"
Vizuális fényesség:8.312
Távolság:301.205 parszek
RA sajátmozgás:5.7
Dec sajátmozgás:-9.2
B-T magnitude:10.528
V-T magnitude:8.495

Katalógusok és elnevezések:
Megfelelő nevek
HD 1989HD 185378
TYCHO-2 2000TYC 479-1337-1
USNO-A2.0USNO-A2 0900-15992607
HIPHIP 96629
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