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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .008176101849865777 4.021e-08  
a 3.163204086520197 1.5209e-08 au
q 3.137341407736896 1.222e-07 au
i 13.33512788304403 4.6632e-06 deg
node 44.21689334599048 1.498e-05 deg
peri 200.6294936866636 0.00025954 deg
M 194.860373285933 0.0002599 deg
tp 2459543.123025791762
(2021-Nov-24.62302579)
0.0014845 TDB
period 2054.893159426816
5.63
1.4821e-05
4.058e-08
d
yr
n .1751915900583449 1.2635e-09 deg/d
Q 3.189066765303498 1.5334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2303  
   data-arc span      40777 days (111.64 yr)  
   first obs. used      1908-04-07  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42822  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:08:27  

Additional Information
 Earth MOID = 2.12794 au 
 Jupiter MOID = 1.7869 au 
 T_jup = 3.162 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454858.5 (2009-Jan-27.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0134396328798657 4.3536e-08  
q 3.119578597206523 1.3552e-07 au
tp 2455325.207098694471
(2010-May-08.70709869)
0.00080495 TDB
node 44.49495189198504 1.4949e-05 deg
peri 181.1934730682476 0.00014223 deg
i 13.35994454473876 4.6659e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2303  
   data-arc span      40777 days (111.64 yr)  
   first obs. used      1908-04-07  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42822  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:08:27  

Additional Information
 Jupiter MOID = 1.7869 au 
 T_jup = 3.162 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.895347019617868E-15 -5.866990293012105E-15 -5.759641898666287E-12 -3.846665931797322E-15 -9.780259636686977E-13 -2.912757246393637E-15
q -5.866990293012105E-15 1.83664706035606E-14 2.215552731631109E-11 1.080391994332032E-14 3.779890354670996E-12 1.002345697135797E-14
tp -5.759641898666287E-12 2.215552731631109E-11 6.479435692759323E-7 5.616752681275138E-11 1.138674443949469E-7 4.659639128334229E-11
node -3.846665931797322E-15 1.080391994332032E-14 5.616752681275138E-11 2.234874451843696E-10 -2.070177927595819E-10 -2.061159454718369E-11
peri -9.780259636686977E-13 3.779890354670996E-12 1.138674443949469E-7 -2.070177927595819E-10 2.022950208386986E-8 2.810797552632549E-11
i -2.912757246393637E-15 1.002345697135797E-14 4.659639128334229E-11 -2.061159454718369E-11 2.810797552632549E-11 2.177027639445821E-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-January); 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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