Poчetna     Да почнемо     To Survive in the Universe    
Inhabited Sky
    News@Sky     Астро Фотографије     Колекција     Форум     Blog New!     FAQ(Често постављана питања     Штампа     Улогуј се  

HD 137794


Садржај

Слике

Уплоадјуј своје слике

DSS Images   Other Images


Везани чланци

A multicolor survey of absolute proper motions: galactic structure and kinematics in the direction of the galactic center at intermediate latitude.
Bienayme et al. (1992) have published a magnitude-limited sample ofproper motions for stars at the intermediate galactic latitude (l=3deg,b=47deg; α_1950_=15h18m, δ_1950_=+02d16') for a 2 squaredegree field. In their study there was a lack of an accurate absoluteastrometric reference due to very small number of galaxies orextragalactic objects in the field. However, since Bienayme et al.paper, more deep photographic plates and CCD standards have beenobtained. Here we have derived a new photographic photometry and propermotions for ~20000 stars with completeness to V~18 in the same directionfor a 15.5 square degree field. The combination of four glass copies ofthe Palomar Observatory Sky Survey (i.e. POSS 1402 E&O and POSS 1429E&O) has been used as a first epoch for proper motion determination.The random error of the proper motions is approximately 0.3"/century toV~17. The photometric accuracy ranges between 0.07 to 0.10 in the V, Band U bands. We stress the importance of the magnitude and color effectsin astrometric surveys of field stars. Using color-magnitude diagrams ofa few cluster member stars, a new distance of 6.9+/-0.5kpc is derivedfor M5 and 20.3+/-0.8kpc for Pal 5 globular clusters. This is in goodagreement with other determinations. We have analyzed the components ofU+W and V galactic space motions resulting from the accurate propermotions survey. No dependence with z distance is found in the asymmetricdrift of the thick disk population. New estimates of the parameters ofthe velocity ellipsoid have been derived for the thin disk, thick diskand halo populations of the Galaxy.

Додај нови чланак


Линкови у сродству са темом

  • - Нема линкова -
Додај нови линк


Чланови следећих група \:


Посматрања и Астрометриски подаци

Сазвежђа:Змија
Ректацензија:15h28m00.11s
Deклинација:-00°06'28.2"
Apparent магнитуда:8.974
Даљина:268.817 parsecs
Proper motion RA:-13.9
Proper motion Dec:-20.4
B-T magnitude:10.411
V-T magnitude:9.093

Каталог и designations:
Proper имена   (Edit)
HD 1989HD 137794
TYCHO-2 2000TYC 5003-631-1
USNO-A2.0USNO-A2 0825-08756225
HIPHIP 75705

→ Захтевај још каталога од VizieR