2015 Close Approaches

Small pieces of rock, with a big influence (just ask the dinosaurs).
Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2015 Close Approaches

Post by Christopher K. » July 2nd, 2015, 7:06 pm

2015 HM10
Tuesday, 7 July 2015 at 1:40pm CDT
Classification: Apollo
Diameter: ~50 to 110 meters
Probable Distance: 422,400 kilometers (1.1 LD)


It's been a while since I checked this list, but for several months now space enthusiasts and even the mildly curious have been focusing on dwarf planets Pluto and Ceres. I could find no impact risk associated with 2015 HM10 (which should not be confused with 2015 HD10!).

2015 HM10's Orbit Diagram: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015%20HM10;orb=1
2015 HM10's Minor Planet Electronic Circular: http://www.minorplanetcenter.net/mpec/K15/K15H90.html

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2015 Close Approaches

Post by Christopher K. » July 21st, 2015, 4:39 pm

2015 OQ21
Thursday, 23 July 2015 at 7:00pm CDT
Classification: Apollo
Diameter: about seven to sixteen meters
Probable Distance: 576,000 kilometers (1.5 LD)


This object's orbit parameters were determined with ten sets of measurements over about forty-eight hours. Magnitude estimates with those measurements ranged from 18.3 to 21.3. I could find no impact risk associated with 2015 OQ21.

2015 OQ21's Orbit Diagram: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015%20OQ21;orb=1
2015 OQ21's Minor Planet Electronic Circular: http://www.minorplanetcenter.net/mpec/K15/K15O32.html

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2015 Close Approaches

Post by Christopher K. » August 13th, 2015, 3:54 pm

2015 PL9
Friday, 8 August 2015 at 8:48pm CDT (±0:02)
Classification: Apollo
Diameter: about ten to twenty-one meters
Probable Distance: 460,800 kilometers (1.2 LD)


This object's orbit parameters were determined with sixteen sets of measurements on the 10th and 11th. Magnitude estimates with those measurements ranged from 18.7 to 20.6. I could find no impact risk associated with 2015 PL9.

2015 PL9's Orbit Diagram: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015%20PL9;orb=1
2015 OQ21's Minor Planet Electronic Circular: http://www.minorplanetcenter.net/mpec/K15/K15P29.html

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2015 Close Approaches

Post by Christopher K. » October 1st, 2015, 7:28 pm

2015 SZ2
Wednesday, 30 September 2015 at 2:54pm CDT
Classification: Apollo
Diameter: about twenty to fifty meters
Probable Distance: 499,200 kilometers (1.3 LD)


This object's orbit parameters were determined with over two hundred sets of observations from the 12th to the 30th. Magnitude estimates with those measurements ranged from 17.6 to 20.3. I could find no impact risk associated with 2015 SZ2.

2015 SZ2's Orbit Diagram: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2015%20SZ2;orb=1
2015 SZ2's Minor Planet Electronic Circular: http://www.minorplanetcenter.net/mpec/K15/K15S78.html

Christopher K.
Posts: 4335
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2015 Close Approaches

Post by Christopher K. » October 30th, 2015, 6:25 pm

2015 TB145
Saturday, 31 October 2015 at 12:01pm CDT
Classification: Apollo
Diameter: 280 to 620 meters
Probable Distance: 499,200 kilometers (1.3 LD)


This object's orbit parameters were determined with over two dozen sets of observations from the 10th to the 31th. Magnitude estimates with those measurements ranged from 19.0 to 20.1. I could find no impact risk associated with 2015 TB145.

2015 TB145's Orbit Diagram: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2 ... B145;orb=1
2015 TB145's Minor Planet Electronic Circular: http://www.minorplanetcenter.net/mpec/K15/K15T86.html

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