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78998 (2504 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2078998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09295578642188138 5.9463e-08  
a 3.015672203542881 2.1971e-08 au
q 2.735348022271944 1.7425e-07 au
i 9.538440052761189 6.1841e-06 deg
node 7.136984830105852 2.7993e-05 deg
peri 28.7619019157065 4.2527e-05 deg
M 116.6112453034127 2.9836e-05 deg
tp 2458380.898359696171
(2018-Sep-19.39835970)
0.00015857 TDB
period 1912.822300533741
5.24
2.0904e-05
5.723e-08
d
yr
n .1882035774570111 2.0568e-09 deg/d
Q 3.295996384813817 2.4013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      852  
   data-arc span      21766 days (59.59 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5499  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:36:48  

Additional Information
 Earth MOID = 1.74533 au 
 Jupiter MOID = 2.1565 au 
 T_jup = 3.220 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457192.5 (2015-Jun-19.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09159175612320623 5.8916e-08  
q 2.740867289976938 1.7211e-07 au
tp 2456471.492354340029
(2013-Jun-27.99235434)
0.00016472 TDB
node 7.158445458113498 2.7993e-05 deg
peri 29.50932920391979 4.3066e-05 deg
i 9.537253076222731 6.183e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      852  
   data-arc span      21766 days (59.59 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5499  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:36:48  

Additional Information
 Jupiter MOID = 2.1565 au 
 T_jup = 3.220 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.471089709664511E-15 -1.00782857813149E-14 -4.095695345113412E-12 2.374330751333272E-14 -9.225219720333488E-13 -3.620796444780636E-15
q -1.00782857813149E-14 2.962217152716181E-14 1.168562282369782E-11 -6.975406828541234E-14 2.664447577115339E-12 1.088633006912313E-14
tp -4.095695345113412E-12 1.168562282369782E-11 2.713143705736702E-8 -3.511676593019817E-11 5.397818299615137E-9 -3.364628846265824E-12
node 2.374330751333272E-14 -6.975406828541234E-14 -3.511676593019817E-11 7.835935123947904E-10 -7.798849949891861E-10 -2.997674714800695E-11
peri -9.225219720333488E-13 2.664447577115339E-12 5.397818299615137E-9 -7.798849949891861E-10 1.854645378572518E-9 2.912948636033775E-11
i -3.620796444780636E-15 1.088633006912313E-14 -3.364628846265824E-12 -2.997674714800695E-11 2.912948636033775E-11 3.822910557843965E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO417370  
diameter diameter 5.345 km 1.882 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.129   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78998 (2504 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2504 P-L = 2002 RD98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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