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117919 (4537 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117919
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424927646967996 5.7458e-08  
a 2.228339177749568 9.6144e-09 au
q 1.910816967629839 1.2378e-07 au
i 6.443092637470944 5.2729e-06 deg
node .5353226134159756 3.8098e-05 deg
peri 53.36829948276489 4.502e-05 deg
M 300.2203831841036 2.0344e-05 deg
tp 2459202.253462535136
(2020-Dec-18.75346254)
6.8728e-05 TDB
period 1214.983473987997
3.33
7.8632e-06
2.153e-08
d
yr
n .2963003264714007 1.9176e-09 deg/d
Q 2.545861387869297 1.0984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      534  
   data-arc span      20989 days (57.46 yr)  
   first obs. used      1960-09-24  
   last obs. used      2018-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55501  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 04:37:23  

Additional Information
 Earth MOID = .929319 au 
 Jupiter MOID = 2.80606 au 
 T_jup = 3.622 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.7   n/a MPO325295  
diameter diameter 1.768 km 0.525 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.594 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.142   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117919 (4537 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 4537 P-L = 1990 TW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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