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JPL Small-Body Database Browser
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1867 Deiphobus (1971 EA)
Classification: Jupiter Trojan          SPK-ID: 2001867
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 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04498305120120939 5.0274e-08  
a 5.128503662223491 6.8263e-08 au
q 4.897807919400102 2.9222e-07 au
i 26.91489309613484 5.2815e-06 deg
node 283.7090994755804 1.1841e-05 deg
peri 359.1564483825562 6.6364e-05 deg
M 315.0351127075851 6.7353e-05 deg
tp 2459530.353051974887
(2021-Nov-11.85305197)
0.00079475 TDB
period 4242.134478632096
11.61
8.4697e-05
2.319e-07
d
yr
n .08486293912023372 1.6943e-09 deg/d
Q 5.359199405046881 7.1333e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2091  
   data-arc span      17954 days (49.16 yr)  
   first obs. used      1971-03-03  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43615  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:31:33  

Additional Information
 Earth MOID = 3.88136 au 
 Jupiter MOID = .15844 au 
 T_jup = 2.783 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.3   n/a MPO435714  
diameter diameter 118.220 km 1.616 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 58.66 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D.; Coley, D.R. (2017) Minor Planet Bull. 44, 252-257.]
geometric albedo albedo 0.060   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.734   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=.50, mean=3.99, max.=9.61) deg.
U-B UB 0.232   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=.50, mean=3.55, max.=9.61) 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

1867 Deiphobus (1971 EA)          Discovered 1971-Mar-03 by Cesco, C. U. and Samuel, A. at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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