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237434 (1999 PH3)
Classification: Main-belt Asteroid          SPK-ID: 2237434
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2914527685190502 8.5636e-08  
a 2.756167415427502 2.7368e-08 au
q 1.952874791699161 2.2902e-07 au
i 6.021490003896167 6.2847e-06 deg
node 286.1452215183318 7.8995e-05 deg
peri 66.21334432690944 7.9691e-05 deg
M 180.8862543182495 1.9089e-05 deg
tp 2459832.040168558439
(2022-Sep-09.54016856)
9.8832e-05 TDB
period 1671.309254025267
4.58
2.4893e-05
6.815e-08
d
yr
n .2153999920319699 3.2083e-09 deg/d
Q 3.559460039155843 3.5344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      301  
   data-arc span      7529 days (20.61 yr)  
   first obs. used      1999-08-10  
   last obs. used      2020-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50667  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 01:31:42  

Additional Information
 Earth MOID = .956629 au 
 Jupiter MOID = 1.94317 au 
 T_jup = 3.273 
[ 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 16.0   n/a MPO413126  
diameter diameter 5.569 km 0.652 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 35.429 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 0.025   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

237434 (1999 PH3)          Discovered 1999-Aug-10 by Pravec, P., Kusnirak, P. at Ondrejov
Reference: 20100428/Numbers.arcLast Updated: 2010-05-03

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