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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1401313673536782 3.7582e-08  
a 3.977789480428875 2.6203e-08 au
q 3.4203764014913 1.5315e-07 au
i 7.825017867304179 4.018e-06 deg
node 228.1043930084303 3.1613e-05 deg
peri 39.24003556085096 3.5267e-05 deg
M 273.9634012150314 1.8819e-05 deg
tp 2460089.035199029379
(2023-May-24.53519903)
0.00015527 TDB
period 2897.751365946998
7.93
2.8633e-05
7.839e-08
d
yr
n .1242342611690394 1.2276e-09 deg/d
Q 4.53520255936645 2.9875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3556  
   data-arc span      51567 days (141.18 yr)  
   first obs. used      1880-05-15  
   last obs. used      2021-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41594  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:15:48  

Additional Information
 Earth MOID = 2.40969 au 
 Jupiter MOID = .574284 au 
 T_jup = 3.023 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456185.5 (2012-Sep-15.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138385339564954 3.7548e-08  
q 3.422348667906392 1.5236e-07 au
tp 2457186.373381290789
(2015-Jun-12.87338129)
0.00014259 TDB
node 228.1730704225685 3.1602e-05 deg
peri 38.87615046675293 3.5358e-05 deg
i 7.827756957729491 4.0199e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3556  
   data-arc span      51567 days (141.18 yr)  
   first obs. used      1880-05-15  
   last obs. used      2021-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41594  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:15:48  

Additional Information
 Jupiter MOID = .574284 au 
 T_jup = 3.023 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.409884065017941E-15 -5.661401351968597E-15 4.391376801987338E-13 -8.592774382312766E-16 5.001604057134555E-14 3.46713969056264E-16
q -5.661401351968597E-15 2.321318049522233E-14 -4.203594399418682E-13 -3.717495145569334E-15 -6.344596605995607E-14 -2.358068135463107E-16
tp 4.391376801987338E-13 -4.203594399418682E-13 2.03320405424271E-8 1.182392995853343E-12 2.301811877733526E-9 2.004565343418471E-12
node -8.592774382312766E-16 -3.717495145569334E-15 1.182392995853343E-12 9.986679926397145E-10 -9.886970404030582E-10 4.950150237720181E-12
peri 5.001604057134555E-14 -6.344596605995607E-14 2.301811877733526E-9 -9.886970404030582E-10 1.250207736039989E-9 -4.660697723372227E-12
i 3.46713969056264E-16 -2.358068135463107E-16 2.004565343418471E-12 4.950150237720181E-12 -4.660697723372227E-12 1.615999520156387E-11

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 7.60   n/a MPO614063 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. 2020-October); 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.; Coley, D.R. (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.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 192-195.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 123-124.]
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

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