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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2918652380364474 6.6608e-08  
a 2.755218052519873 2.2478e-08 au
q 1.951065679778843 1.832e-07 au
i 6.021540461936725 5.3087e-06 deg
node 286.137538283014 7.4772e-05 deg
peri 66.25536766341112 7.5418e-05 deg
M 266.1818848828549 1.7632e-05 deg
tp 2459831.827990865702
(2022-Sep-09.32799087)
8.5955e-05 TDB
period 1670.445803733835
4.57
2.0442e-05
5.597e-08
d
yr
n .2155113318823731 2.6374e-09 deg/d
Q 3.559370425260903 2.9039e-08 au
  Orbit Determination Parameters
   # obs. used (total)      323  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1999-08-10  
   last obs. used      2021-05-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50861  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 04:07:06  

Additional Information
 Earth MOID = .954032 au 
 Jupiter MOID = 1.94442 au 
 T_jup = 3.273 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457362.5 (2015-Dec-06.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2893795391890976 6.6277e-08  
q 1.962084713446778 1.8205e-07 au
tp 2458160.552955029615
(2018-Feb-11.05295503)
7.1725e-05 TDB
node 286.3331623127294 7.4681e-05 deg
peri 65.81191449300087 7.5355e-05 deg
i 6.019588295448043 5.3063e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      323  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1999-08-10  
   last obs. used      2021-05-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50861  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 04:07:06  

Additional Information
 Jupiter MOID = 1.94442 au 
 T_jup = 3.273 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.392688194440586E-15 -1.201879874688605E-14 1.842966067725667E-12 -5.090847089357967E-15 3.425251583314624E-13 -2.681536622366082E-15
q -1.201879874688605E-14 3.314377884848429E-14 -4.308772117768338E-12 8.880414253845931E-15 -8.438172518990654E-13 7.55136859061831E-15
tp 1.842966067725667E-12 -4.308772117768338E-12 5.144454786755415E-9 2.395060477772811E-11 8.277849983967897E-10 -2.876567067617285E-12
node -5.090847089357967E-15 8.880414253845931E-15 2.395060477772811E-11 5.577292682194861E-9 -5.544139212304925E-9 -1.609019930912539E-11
peri 3.425251583314624E-13 -8.438172518990654E-13 8.277849983967897E-10 -5.544139212304925E-9 5.67832313709704E-9 1.559831420544684E-11
i -2.681536622366082E-15 7.55136859061831E-15 -2.876567067617285E-12 -1.609019930912539E-11 1.559831420544684E-11 2.815669635817563E-11

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 16.10   n/a E2021B55  
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. 2020-October); 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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