PHA: 2011 WN15  (Apollo Type asteroid)


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The potentially hazardous asteroid (PHA) passed the Earth on December, 01 2011, 06:59UT  in 0.23089 AU.  Its period is 1.35 years, MOID = 0.00166483 AU ~ 249,000 km.

Discovered by 703 Catalina Sky Survey on November, 27 2011;  published in M.P.E.C. 2011-W41   Issued 2011 Nov. 23, 18:38 UT
Follow-Up observation by B82 Maidbronn on December, 11 2011, published in  M.P.E.C. 2011-X40   Issued 2011 Dec. 12, 06:02 UT

Minor planet center's orbital elements and Ephemeris,   JPL Small body database

PHA 2011 WN15  by B82 Bernhard Haeusler, Germany     PHA 2011 WN15  by B82 Bernhard Haeusler, Germany

2011 WN15 by Bernhard Haeusler, 2011-12-11 B/W                                                                          JAVA orbit here: JPL Small body database

total basis: 135 x 30 sec. exposure, 2011-12-11 UT 02:52 - UT 04:38, 12" SCT  f-5.65 + CCD ST10XME
mag 18.4, velocity: 7.0"/min in PA 282.4  


  PHA 2011 WN15  by B82 Bernhard Haeusler, Germany

2011 WN15 by Bernhard Haeusler, 2011-12-11 

GIF animation 5 x 40.5min. = around 1h46m in reality

total basis: 135 x 30 sec. exposure, 2011-12-11 UT 02:52 - UT 04:38, 12" SCT  f-5.65 + CCD ST10XME
mag 18.4, velocity: 7.0"/min in PA 282.4  


NEODyS Observations and Residuals of B82 Maidbronn

MPC observation computed with Astrometrica:

COD B82
OBS Bernhard Haeusler
TEL 0.30-m Schmidt-Cassegrain + CCD

NET CMC-14

K11W15N KC2011 12 11.12736 06 38 54.11 +43 31 40.4          17.4 R      B82
K11W15N KC2011 12 11.14210 06 38 40.75 +43 32 11.0          17.9 R      B82
K11W15N KC2011 12 11.15686 06 38 27.37 +43 32 43.0          17.6 R      B82
K11W15N KC2011 12 11.17159 06 38 14.04 +43 33 13.7          17.7 R      B82
K11W15N KC2011 12 11.18635 06 38 00.78 +43 33 45.4          18.1 R      B82

Gauss curve produced by Astrometrica. The total PSF is using the aperture circle of 3 x 3 pixel around the brightest pixel.
You see the Gauss curve right as the computed ideal line and the real pixels contributed around the ideal line.
The Fit RMS is the deviation from the ideal line (inlay under the Gauss curve).


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Copyright of all sites and images of this web: Bernhard Haeusler, Rimpar, Germany   MPC code: B82 Maidbronn