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478 Tergeste (A901 SC)
Classification: Main-belt Asteroid          SPK-ID: 2000478
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08225277689729663 4.0243e-08  
a 3.018970417263157 1.1029e-08 au
q 2.770651717072472 1.1964e-07 au
i 13.17623850585933 4.293e-06 deg
node 233.8966390435461 1.9515e-05 deg
peri 240.1394588465245 3.2475e-05 deg
M 139.3314614374024 2.5944e-05 deg
tp 2458258.962011348068
0.00013772 TDB
period 1915.961213359051
n .1878952441677304 1.0296e-09 deg/d
Q 3.267289117453842 1.1936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2612  
   data-arc span      43415 days (118.86 yr)  
   first obs. used      1901-09-22  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44866  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:16:56  

Additional Information
 Earth MOID = 1.81405 au 
 Jupiter MOID = 2.02219 au 
 T_jup = 3.202 
[ 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 8.0   n/a MPO473767 IRAS observations used: 21
diameter diameter 80.738 km 1.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 16.101 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site,]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Aznar Macias, A. (2017) Minor Planet Bull. 44, 139-141.]
[Brines, P.; Lozano, J.; Rodrigo, O.; Fornas, A.; et al. (2017) Minor Planet Bull. 44, 145-149.]
[Marciniak, A.; Bartczak, P.; Muller, T.; Sanabria, J.J.; et al. (2018) Astron. Astrophys. 610, A7.]
geometric albedo albedo 0.174   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.850   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.71, mean=9.56, max.=18.44) deg.
U-B UB 0.445   0.053 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.64, mean=10.93, max.=18.44) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B L   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

478 Tergeste (A901 SC)          Discovered 1901-Sep-21 by Carnera, L. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A901 SC = 1948 RU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Oct-21 20:19 UT
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