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J/A+A/375/285 Photometric observations of 9 Near-Earth Objects (Szabo+, 2001)
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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
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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 R_C_ 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: 1866time.dat 699time.dat cv3time.dat
Byte-by-byte Description of file: nd43time.dat rh27time.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 <l.kiss@physx.u-szeged.hu>
Gyula M. Szabo <szgy@neptun.physx.u-szeged.hu>
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(End) Patricia Bauer [CDS] 17-Sep-2001