J/A+A/375/285 Photometric observations of 9 Near-Earth Objects (Szabo+, 2001)
Photometric observations of 9 Near-Earth Objects.
Szabo G.M., Csak B., Sarneczky K., Kiss L.L.
<Astron. Astrophys. 375, 285 (2001)>
=2001A&A...375..285S 2001A&A...375..285S
ADC_Keywords: Solar system ; Minor planets ; Magnitudes
Keywords: solar system - minor planets
Abstract:
We present new CCD observations of nine Near-Earth Asteroids carried
out between February, 1999 and July, 2000. The bulk of the data was
acquired through an RC filter, while the minor planet 11405 was
observed without filter.
Data were obtained with the 1.23m telescope of the German-Spanish
Astronomical Centre, Calar Alto; with the 0.60m telescope of the
Konkoly Observatory and with the 0.28m telescope of the
Szeged Observatory.
We could determine synodic periods and amplitudes for 5 asteroids,
699: 3.3h, 0.18m; 1866: 2.7h, 0.12m; 1999 JD6: 7.68h, 1.2m ; 2000
GK137: 4.84h, 0.27m; 2000 NM: 9.24h, 0.30m. Based on observations
taken at different phases, we could infer a phase parameter m of
0.018±0.005 for 1865 Cerberus. An epoch-method yielded a sideral
period of 0.27024003(5) for this object with retrograde rotation. The
remaining 3 objects have only partial coverage, thus no firm
conclusion on their synodic period is possible.
Objects:
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Ecliptic coordinates Designation Epoch
lambda beta = Start of obs.
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327 +20 699 Hela (1999/09/15)
16 +20 1865 Cerberus (1999/09/24)
28 +48 1865 Cerberus (2000/07/07)
195 +20 1866 Sisyphus (2000/06/30)
168 +53 11405 1999 CV3 (1999/02/27)
54 +61 16064 1999 RH27 (2000/01/01)
263 -13 1999 JD6 (2000/07/02)
50 +33 1999 ND43 (1999/09/23)
287 +37 2000 GK137 (2000/06/29)
272 -5 2000 NM (2000/07/03)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
1865ph.dat 27 127 Rotational phase - R magnitude of 1865
gk137ph.dat 25 470 Rotational phase - R magnitude of 2000 GK137
jd6ph.dat 26 233 Rotational phase - R magnitude of 1999 JD6
nmph.dat 26 626 Rotational phase - R magnitude of 2000 NM
1866time.dat 29 41 Time - R magnitude of 1866 on 2000/06/30
699time.dat 26 119 Time - R magnitude of 699 on 1999/09/15
cv3time.dat 26 111 Time - unfiltered magnitude of 11405 on 1999/02/27
nd43time.dat 26 117 Time - R magnitude of 1999 ND43 on 1999/09/23
rh27time.dat 26 49 Time - R magnitude of 1999 RH27 on 2000/01/01
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Byte-by-byte Description of file: 1865ph.dat gk137ph.dat jd6ph.dat nmph.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "DD/MM/YYYY" Date Start of observation date
12- 18 F7.5 --- Phase Phase of rotation in units of period of
rotation
20- 26 F7.4 mag Rmag standardized R (Cousins) magnitude
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Byte-by-byte Description of file: *time.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "DD/MM/YYYY" Date Start of observation date
12- 19 F8.5 h UT Time to data point
21- 28 F8.5 mag Rmag Standardized R (Cousins) magnitude
(or unfiltered magnitude for CV 3)
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Acknowledgements: Laszlo Kiss
Gyula M. Szabo
(End) Patricia Bauer [CDS] 17-Sep-2001