J/AJ/127/3023 R magnitudes of Kuiper Belt object 2001QG298 (Sheppard+, 2004)
Extreme Kuiper belt object 2001 QG298 and the fraction of contact binaries.
Sheppard S.S., Jewitt D.
<Astron. J., 127, 3023-3033 (2004)>
=2004AJ....127.3023S 2004AJ....127.3023S
ADC_Keywords: Solar system ; Minor planets
Keywords: Kuiper belt - minor planets, asteroids - solar system: general
Abstract:
Extensive time-resolved observations of Kuiper belt object 2001 QG298
show a light curve with a peak-to-peak variation of 1.14±0.04mag
and single-peaked period of 6.8872±0.0002hr. The mean absolute
magnitude is 6.85mag, which corresponds to a mean effective radius of
122(77)km if an albedo of 0.04(0.10) is assumed. This is the first
known Kuiper belt object and only the third minor planet with a radius
greater than 25km to display a light curve with a range in excess of
1mag. We find the colors to be typical for a Kuiper belt object
(B-V=1.00±0.04, V-R=0.60±0.02), with no variation in color between
minimum and maximum light.
Description:
We used the University of Hawaii (UH) 2.2m diameter telescope atop
Mauna Kea in Hawaii to obtain R-band observations of 2001 QG298 on
three separate observing runs each covering several nights: UT 2002
September 12 and 13; 2003 August 22, 26, 27, and 28; and 2003
September 27, 28, and 30.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 50 113 R-Band Observations at the UH 2.2 Meter Telescope
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See also:
J/A+A/380/347 : BVRI photometry of 27 Kuiper Belt Objects (Delsanti+, 2001)
J/A+A/407/1139 : RVB phot. of Kuiper-Belt object 1999 TD10 (Rousselot+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Num Image number
9- 24 A16 --- Obs.Date UT date of the integration start
(YYYY/MM/dd.ddddd)
26- 39 F14.6 d JD Julian Date of integration start (1)
41- 43 I3 s Exp Image exposure time
45- 50 F6.3 mag Rmag Apparent red magnitude (2)
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Note (1): No light-time correction has been made in the table.
Note (2): Uncertainties are ±0.03 to ±0.04.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 29-Dec-2006