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10172 Humphreys (1995 FW19)
Classification: Main-belt Asteroid          SPK-ID: 2010172
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06206488976748228 6.4683e-08  
a 2.740050065811872 2.8553e-08 AU
q 2.569989160519875 1.8528e-07 AU
i 5.453025102093646 7.468e-06 deg
node 10.43286050654698 6.1022e-05 deg
peri 299.6569480359695 8.4165e-05 deg
M 350.7327449003433 5.9711e-05 deg
tp 2457043.146637191549
0.00027489 JED
period 1656.67063481683
n .2173033024393551 3.3967e-09 deg/d
Q 2.910110971103868 3.0326e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      953  
   data-arc span      11240 days (30.77 yr)  
   first obs. used      1983-09-11  
   last obs. used      2014-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53168  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:23:29  

Additional Information
 Earth MOID = 1.56228 AU 
 T_jup = 3.341 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO299036  

10172 Humphreys           Discovered 1995 Mar. 31 by Spacewatch at Kitt Peak.
Minnesota astronomer Roberta M. Humphreys (b. 1944) is a leader in studies of physical properties of massive stars in the Milky Way and in nearby galaxies. She headed the Automated Plate Scanner Project to digitize the Palomar Sky Survey and make a publicly available database of a billion stars and several million galaxies.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1995 FW19 = 1983 RF8 = 1997 TF24 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2015-Mar-31 15:29 UT
(server date/time)  
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