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884 Priamus (1917 CQ)
Classification: Jupiter Trojan          SPK-ID: 2000884
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1215543111539918 5.4176e-08  
a 5.182135690222186 8.4268e-08 au
q 4.552224756090712 2.8787e-07 au
i 8.913900972637343 5.9619e-06 deg
node 301.5577590265728 3.9555e-05 deg
peri 335.6307430478537 4.8298e-05 deg
M 207.4526720564512 3.1118e-05 deg
tp 2459426.344138511019
0.00038404 JED
period 4308.852201640703
n .08354893209447309 2.0379e-09 deg/d
Q 5.81204662435366 9.4511e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1407  
   data-arc span      35954 days (98.44 yr)  
   first obs. used      1917-11-08  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52646  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:30:42  

Additional Information
 Earth MOID = 3.5381 au 
 Jupiter MOID = .420007 au 
 T_jup = 2.961 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.81 mag n/a PDS3 (MPC 17260)  
rotation period rot_per 6.8605 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[French, L.M.; Stephens, R.D.; Lederer, S.M. (2011) Minor Planet Bul. 38, 2-3.]
[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 Bul. 42, 216-224.]
B-V BV .718 mag .044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=8; phase (min.=.98, mean=2.85, max.=6.08) deg.
U-B UB .229 mag .051 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (1917 CQ)          Discovered 1917-Sep-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1917 CQ = 1929 XX = 1938 KE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-01 09:54 UT
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