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249560 (4176 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2249560
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1981723151812022 6.9098e-08  
a 2.464665502902085 1.6607e-08 au
q 1.976237034044737 1.6458e-07 au
i 3.801037797511681 4.5214e-06 deg
node 263.4904844780718 9.7712e-05 deg
peri 50.1541447801189 9.8407e-05 deg
M 186.4332382369822 1.3198e-05 deg
tp 2459681.895822526448
(2022-Apr-12.39582253)
5.5806e-05 TDB
period 1413.303409119592
3.87
1.4284e-05
3.911e-08
d
yr
n .2547223743161136 2.5745e-09 deg/d
Q 2.953093971759433 1.9898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      21680 days (59.36 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46317  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:24:39  

Additional Information
 Earth MOID = .964804 au 
 Jupiter MOID = 2.33352 au 
 T_jup = 3.457 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO454850  

249560 (4176 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 4176 P-L = 2009 BW161 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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