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1172 Aneas (1930 UA)
Classification: Jupiter Trojan          SPK-ID: 2001172
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1043692173282853 4.5896e-08  
a 5.218844354636134 6.1644e-08 au
q 4.67415765398462 2.6368e-07 au
i 16.66408274890899 4.3981e-06 deg
node 247.325970052181 1.7781e-05 deg
peri 50.65751865316979 3.0689e-05 deg
M 271.7330829419373 2.8133e-05 deg
tp 2459668.215140769487
0.00034708 TDB
period 4354.717072809606
n .08266897572928492 1.4647e-09 deg/d
Q 5.763531055287647 6.8078e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2328  
   data-arc span      32446 days (88.83 yr)  
   first obs. used      1930-10-17  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42033  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:15:39  

Additional Information
 Earth MOID = 3.6861 au 
 Jupiter MOID = .47865 au 
 T_jup = 2.905 
[ 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 8.33   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 118.020 km 0.806 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 8.705 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bull. 38, 116-120.]
[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. (2015) Minor Planet Bull. 42, 216-224.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.059   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
B-V BV 0.725   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.69, mean=3.49, max.=4.87) deg.
U-B UB 0.254   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=2.69, mean=4.41, max.=9.96) 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

1172 Aneas (1930 UA)          Discovered 1930-Oct-17 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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