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153 Hilda (A875 VC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000153
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402833765469989 4.2132e-08  
a 3.979001314315939 2.8192e-08 au
q 3.420813574658752 1.6717e-07 au
i 7.82473284593624 4.4972e-06 deg
node 228.1318919614637 3.2057e-05 deg
peri 39.05005486246291 3.5779e-05 deg
M 224.9811884425856 1.9026e-05 deg
tp 2460087.804864399865
(2023-May-23.30486440)
0.00015968 TDB
period 2899.075667078457
7.94
3.081e-05
8.435e-08
d
yr
n .1241775108142624 1.3197e-09 deg/d
Q 4.537189053973125 3.2147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2951  
   data-arc span      45679 days (125.06 yr)  
   first obs. used      1895-03-30  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43999  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:59:44  

Additional Information
 Earth MOID = 2.41011 au 
 Jupiter MOID = .573737 au 
 T_jup = 3.023 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO502154 IRAS observations used: 19
diameter diameter 170.63 km 3.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
rotation period rot_per 5.9585 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Shevchenko, V.G.; Tungalag, N.; Chiorny, V.G.; Gaftonyuk, N.M.; et al. (2009) Plan. Space Sci. 57, 1514-1520.]
[Warner, B.D.; Stephens, R.D. (2017) Minor Planet Bull. 44, 36-41.]
[Pilcher, F. (2018) Posting on CALL web site: http://www.minorplanet.info/call.html]
[Warner, B.D.; Stephens, R.D. (2018) Minor Planet Bull. 45, 35-39.]
[Pilcher, F. (2019) Minor Planet Bull. 46, 130-131.]
[Pilcher, F.; Benishek, V. (2019) Minor Planet Bull. 46, 318-319.]
geometric albedo albedo 0.0618   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 19
B-V BV 0.669   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.32, mean=7.15, max.=12.62) deg.
U-B UB 0.243   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=2.32, mean=7.15, max.=12.62) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

153 Hilda (A875 VC)          Discovered 1875-Nov-02 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A875 VC = 1935 GD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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