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JPL Small-Body Database Browser
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884 Priamus (A917 SU)
Classification: Jupiter Trojan          SPK-ID: 2000884
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1232715122021679 4.3785e-08  
a 5.183376409112044 6.3652e-08 au
q 4.544413760847759 2.6031e-07 au
i 8.91535626335836 4.6079e-06 deg
node 301.5611415329961 2.869e-05 deg
peri 335.5280334315192 3.57e-05 deg
M 324.7322838942683 2.328e-05 deg
tp 2459422.772096080601
0.00028037 TDB
period 4310.399747272285
n .08351893585457261 1.5384e-09 deg/d
Q 5.822339057376328 7.1498e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      37427 days (102.47 yr)  
   first obs. used      1917-11-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43276  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:14:30  

Additional Information
 Earth MOID = 3.53053 au 
 Jupiter MOID = .416818 au 
 T_jup = 2.961 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.7   n/a MPO473774  
diameter diameter 101.093 km 0.539 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 6.8605 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Lederer, S.M. (2011) Minor Planet Bull. 38, 2-3.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Shevchenko, V.G.; Belskya, I.N.; Slyusarev, L.G.; Krugly, Yu.N.; et al. (2012) Icarus 217, 202-208.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
[Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.]
geometric albedo albedo 0.044   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
B-V BV 0.718   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=.98, mean=2.85, max.=6.08) deg.
U-B UB 0.229   0.051 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.98, mean=2.96, max.=6.08) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

884 Priamus (A917 SU)          Discovered 1917-Sep-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A917 SU = 1929 XX = 1938 KE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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