בית     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     תמונת אסטרו     האוסף     קבוצת דיון     Blog New!     שאלות נפוצות     כניסה  
→ Adopt this star  

TYC 7175-364-1


תוכן

תמונות

הוסף תמונה שלך

DSS Images   Other Images


מאמרים קשורים

Corrections to the Hipparcos Proper Motions in Declination for 807 Stars
We used the data on latitude variations obtained from observations with10 classical photographic zenith tubes (PZT) in order to improve theHipparcos proper motions in declinations ?_{?} for 807 stars.Part of observing programmes, carried out during the last century forthe purpose of studying the Earth's rotation, were realized by using PZTinstruments. These observations were performed within in the intervals(tens of years) much longer than that of the Hipparcos mission (lessthan 4 years). In addition, the annual number of observations for everyPZT-programme star is several hundreds on the average. Though theaccuracy of the star coordinates in the Hipparcos Catalogue is by twoorders of magnitude better than that of the star coordinates from thePZT observations, the large number of observations performed a muchlonger time interval makes it possible to correct the Hipparcos propermotions and to improve their accuracy with respect to the accuracy givenin the Hipparcos Catalogue. Long term examinations of latitude and timevariations were used to form the Earth Orientation Catalogue (EOC-2),aimed at a more accurate determination of positions and proper motionsfor the stars included. Our method of calculating the corrections of theproper motions in declination from the latitude variations is differentfrom the method used in obtaining the EOC-2 Catalogue. Comparing theresults we have established a good agreement between our ?_{?}and the EOC-2 ones for the star sample used in the present paper.

הכנס מאמר חדש


לינקים קשורים

  • - לא נמצאו לינקים -
הכנס לינק חדש


משמש של הקבוצה הבאה


תצפית ומידע אסטרומטרי

קבוצת-כוכבים:משאבת-מים
התרוממות ימנית:09h43m24.76s
סירוב:-35°16'04.2"
גודל גלוי:9.717
תנועה נכונה:-26.1
תנועה נכונה:16.1
B-T magnitude:10.242
V-T magnitude:9.761

קטלוגים וכינוים:
שם עצם פרטי
TYCHO-2 2000TYC 7175-364-1
USNO-A2.0USNO-A2 0525-12146311
HIPHIP 47689

→ הזמן עוד קטלוגים וכינוים מוזיר