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Broad-band Photometry of the Potentially Hazardous Asteroid 2006 DP14

ATel #5928; M. Hicks (JPL/Caltech), S. Ebelhar (PCC)
on 28 Feb 2014; 00:58 UT
Credential Certification: Michael D. Hicks (Michael.Hicks@jpl.nasa.gov)

Subjects: Optical, Asteroid, Planet (minor), Solar System Object, Near-Earth Object, Potentially Hazardous Asteroid

The nearr-Earth Asteroid (NEA) 2006 DP14 was discovered by the LINEAR asteroid discovery program on February 23, 2006 (MPEC 2006-D40). With a likely diameter on the order of ~500 meters and a Minimum Orbit Intersection Distance MOID = 0.016 AU, the object has been designated as a Potentially Hazardous Asteroid (PHA) by the Minor Planet Center. Delay-doppler radar imaging was obtained by the JPL Planetary Radar Team at Goldstone on February 12, 2014 (http://echo.jpl.nasa.gov/asteroids/2006DP14/2006DP14_planning.html). We obtained Bessel BVRI colors and light-curve photometry at the JPL Table Mountain 0.6-m telescope (TMO) on February 15 and 17, as illustrated in Figures 1-2 [1] [2] and summarized in Table 1. The object's high amplitude lightcurve (~1 mag) is consistent with a highly elongated body and/or contact binary.

The rotationally averaged colors (B-R=1.070+/-0.016; V-R=0.400+/-0.015; R-I=0.392+/-0.027) were consistent with both X and C family classifications (Bus Taxonomy), as shown in Figure 3 and Table 2. Our data lack sufficient solar phase coverage to constrain albedo. Assuming a solar phase parameter g=0.15, we measured an absolute magnitude H_V = 18.80+/-0.02 mag, in excellent agreement with the absolute magnitude tabulated on the JPL small bodies database. Applying standard Fourier techniques and assuming a double-peaked lightcurve, we found a best-fit synodic period of 5.78+/-0.02 hr, as shown in Figure 4 .

Copyright 2014. All rights reserved. The research described in this telegram was carried out at the Jet Propulsion Laboratory, under a contract with the National Aeronautics and Space Administration. The student participation was supported by the National Science Foundation under REU grant AST-1156756 to Los Angeles City College.

Table 1: Observational summary. 
UT Date    r(AU) d(AU) p(deg) V(mag)    Observers 
Feb 15.18  1.047 0.071  32.3   14.5    Ebelhar 
Feb 17.25  1.076 0.103  29.8   15.3    Hicks 
Table 2: Top 5 spectral matches in the SMASS II database (Bus & Binzel 2002). 
                            Taxonomic Class 
Misfit  Asteroid Name      (Tholen)    (BUS) 
1.541    4332 Milton                     Xe 
1.655    3389 Sinzot                     C 
1.674     143 Adria            C         Xc 
1.677     634 Ute                        X 
2.039    3762 Amaravella                 X