Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro

Details Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..130..317j&link_type=abstract

Astronomy and Astrophysics Supplement, v.130, p.317-321

Astronomy and Astrophysics

Astrophysics

10

Sun: General, Fundamental Parameters, Ccd Observations

Scientific paper

Observations of the solar diameter are reported from the astrolabe station at Observatorio Nacional. All the observations presented here were taken with the 1986-CERGA prototype of Variable Prism, which enables many diameter measurements per day and to observe all year round. The 1996 DANOF software for digital CCD image acquisition and data processing has been used. We adopted the recording of 46 CCD frames with direct and reflected images of the limbs along the Sun's transit through the almucantar. The independent observable is the accurate UT datation of each frame. Here the first campaign results, from January to July/1997, are presented. An asymmetry between the east and west transit is noticeable. The west transit leads to a larger value for the mean semi-diameter and exhibits a larger standard deviation. No clear dependence is found upon the daily results, either on time or on observational parameters. The main outcome of this campaign remains the average solar semi-diameter, from 1149 transits (863 East and 286 West), obtained as 959farcs 21 +/- 0farcs 03.

Affiliated with

Also associated with

No associations

Rating

Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar diameter observations with the Astrolabe at Observatorio Nacional - Rio de Janeiro will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1330285