Issue |
A&A
Volume 371, Number 2, May IV 2001
|
|
---|---|---|
Page(s) | 753 - 759 | |
Section | Celestial mechanics and astrometry | |
DOI | https://doi.org/10.1051/0004-6361:20010382 | |
Published online | 15 May 2001 |
Photometric study of Centaurs 10199 Chariklo (1997 CU
)
and 1999 UG
1
Centre for Astronomy and Astrophysics of the University of Lisbon/Lisbon Astronomical Observatory, Tapada da Ajuda, 1349-018 Lisbon, Portugal e-mail: peixinho@oal.ul.pt
2
Leiden Observatory, The Netherlands
3
Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain
4
Paris-Meudon Observatory, France
Corresponding author: N. Peixinho, peixinho@oal.ul.pt
Received:
9
November
2000
Accepted:
6
March
2001
We present the results of visible broad band
photometry of two Centaurs, 10199 Chariklo (1997 CU) and
1999 UG
from data obtained at the 1.52 meter telescope of the National Astronomical
Observatory at Calar Alto, Spain, during 2 separate runs in April 1999 and
February 2000 and at the 1.5 meter telescope of the Sierra Nevada Observatory,
Spain, in March of 1999.
For Chariklo, the absolute magnitudes determined from the February 2000
data are found to be higher by about 0.27 mag than the average
in the 1999 run.
This may indicate long period rotational variability and possibly a G
parameter higher than the assumed value of 0.15. From the best sampled
R-lightcurve obtained in the February 2000 run, no short term rotational
variability was found. The
colours for this object in all runs are
similar to previously published values.
For 1999 UG
, colours were found to be very red:
,
and
.
These results place this object in the group of
the reddest known bodies in the Solar System.
HR and HV
are found to be
and
respectively,
and its diameter is estimated to be on the order of
km.
Key words: Minor bodies / Centaurs / photometry / rotation / colours
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.