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JPL Small-Body Database Browser
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10 Hygiea
Classification: Main-belt Asteroid          SPK-ID: 2000010
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1121173205996011 1.6348e-08  
a 3.142435385124691 6.9602e-09 au
q 2.790113949587135 5.0952e-08 au
i 3.831785911531398 2.1752e-06 deg
node 283.1984407227602 2.8609e-05 deg
peri 312.4129341102546 3.0296e-05 deg
M 222.8505434245186 1.1246e-05 deg
tp 2459775.656783501827
(2022-Jul-15.15678350)
6.4829e-05 TDB
period 2034.688645718962
5.57
6.7599e-06
1.851e-08
d
yr
n .1769312473225077 5.8783e-10 deg/d
Q 3.494756820662247 7.7405e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3481  
   data-arc span      62342 days (170.68 yr)  
   first obs. used      1849-05-26  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:46  

Additional Information
 Earth MOID = 1.7803 au 
 Jupiter MOID = 1.53545 au 
 T_jup = 3.197 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451591.5 (2000-Feb-17.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1194634978836104 1.6187e-08  
q 2.763516676799842 5.0883e-08 au
tp 2451662.190572213903
(2000-Apr-27.69057221)
5.4353e-05 TDB
node 283.6610485564125 2.8496e-05 deg
peri 314.3565493142819 3.0021e-05 deg
i 3.842710413843364 2.1813e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3481  
   data-arc span      62342 days (170.68 yr)  
   first obs. used      1849-05-26  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:46  

Additional Information
 Jupiter MOID = 1.53545 au 
 T_jup = 3.197 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.620100528792722E-16 -8.175571808299478E-16 7.16333599531992E-14 -8.28567904186988E-16 1.696615436239895E-14 -1.073514778753572E-17
q -8.175571808299478E-16 2.589120536649975E-15 -2.229971892870048E-13 2.695283173386935E-15 -5.316929474798961E-14 1.031370043232671E-16
tp 7.16333599531992E-14 -2.229971892870048E-13 2.954225446776165E-9 -3.468817398636984E-13 5.184835280135493E-10 -3.697110897136578E-14
node -8.28567904186988E-16 2.695283173386935E-15 -3.468817398636984E-13 8.120304239345938E-10 -8.101568344320845E-10 1.316587207970409E-11
peri 1.696615436239895E-14 -5.316929474798961E-14 5.184835280135493E-10 -8.101568344320845E-10 9.012795697712382E-10 -1.31425922779364E-11
i -1.073514778753572E-17 1.031370043232671E-16 -3.697110897136578E-14 1.316587207970409E-11 -1.31425922779364E-11 4.757924525120067E-12

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 5.5   n/a MPO492748 IRAS observations used: 22
diameter diameter 407.12 km 6.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 22
GM GM 7. km^3/s^2 n/a Scholl et al., A&A, v.179, p.311, 1987  
rotation period rot_per 27.630 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Michalowski, T.; Velichko, F.P.; Lindgren, M.; Oja, T.; et al. (1991) Astron. Astrophys. Suppl. Ser. 91, 53-59.]
[Lagerkvist, C.-I.; Oja, T.; Pohjolainen, S.; Erikson, A. (1992) Minor Planet Bull. 19, 29-30.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Michalowski, T.; Mohamed, R.A.; Velichko, F.P. (1995) Minor Planet Bull. 22, 35-36.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2000) Astron. Astrophys. Suppl. Ser. 145, 255-261.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Shevchenko, V.G.; Belksaya, I.N.; Muinon, K.; Penttila, A.; et al. (2016) Plan. Space Sci. 123, 101-116.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.0717   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 22
B-V BV 0.696   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=4.77, mean=10.97, max.=18.25) deg.
U-B UB 0.351   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=4.77, mean=10.97, max.=18.25) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B C   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)

10 Hygiea          Discovered 1849-Apr-12 by De Gasparis, A. at Naples
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A900 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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