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508 Princetonia (A903 HC)
Classification: Main-belt Asteroid          SPK-ID: 2000508
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 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .008150031839207967 3.4827e-08  
a 3.162471256662869 1.295e-08 au
q 3.136697015230487 1.0852e-07 au
i 13.33411050202178 4.0436e-06 deg
node 44.20427806149904 1.4748e-05 deg
peri 202.9956653992034 0.00025639 deg
M 262.5673208828097 0.00025746 deg
tp 2459556.456037751308
(2021-Dec-07.95603775)
0.0014701 TDB
period 2054.179105038681
5.62
1.2618e-05
3.455e-08
d
yr
n .1752524885084064 1.0765e-09 deg/d
Q 3.188245498095252 1.3056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2737  
   data-arc span      40975 days (112.18 yr)  
   first obs. used      1908-04-07  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39991  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:15:21  

Additional Information
 Earth MOID = 2.1275 au 
 Jupiter MOID = 1.78755 au 
 T_jup = 3.162 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455299.5 (2010-Apr-13.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01295809245794657 3.7873e-08  
q 3.1196646220799 1.2107e-07 au
tp 2455328.383992249559
(2010-May-11.88399225)
0.00083527 TDB
node 44.48085119857038 1.4708e-05 deg
peri 181.7660233382487 0.00014759 deg
i 13.36320671631693 4.0474e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2737  
   data-arc span      40975 days (112.18 yr)  
   first obs. used      1908-04-07  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39991  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:15:21  

Additional Information
 Jupiter MOID = 1.78755 au 
 T_jup = 3.162 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.434355117334097E-15 -4.559772028118522E-15 -5.674572585994347E-12 -3.089267181177814E-15 -9.517694671201682E-13 -2.186148699172399E-15
q -4.559772028118522E-15 1.465694463678707E-14 2.218099190542912E-11 8.532943289506293E-15 3.752935586704567E-12 7.842529322084407E-15
tp -5.674572585994347E-12 2.218099190542912E-11 6.976681737522677E-7 3.741146066553758E-11 1.22675970556135E-7 6.515267730791956E-11
node -3.089267181177814E-15 8.532943289506293E-15 3.741146066553758E-11 2.163225159650703E-10 -2.034189388948823E-10 -1.477263846092718E-11
peri -9.517694671201682E-13 3.752935586704567E-12 1.22675970556135E-7 -2.034189388948823E-10 2.178286877495949E-8 2.574253718112191E-11
i -2.186148699172399E-15 7.842529322084407E-15 6.515267730791956E-11 -1.477263846092718E-11 2.574253718112191E-11 1.6381501237524E-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 8.4   n/a MPO296126  
diameter diameter 117.241 km 0.925 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 52.8 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.]
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.732   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.13, mean=5.20, max.=7.94) deg.
U-B UB 0.325   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.13, mean=5.20, max.=7.94) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

508 Princetonia (A903 HC)          Discovered 1903-Apr-20 by Dugan, R. S. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A903 HC = 1926 KA = A920 GF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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