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10 Hygiea (A849 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000010
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1119474562459423 1.6279e-08  
a 3.142659686791983 6.8119e-09 au
q 2.790846929008951 5.0833e-08 au
i 3.831485302564607 2.1718e-06 deg
node 283.1982456195649 2.8469e-05 deg
peri 312.4209334969726 3.0163e-05 deg
M 258.2093350133198 1.1274e-05 deg
tp 2459775.873571301117
(2022-Jul-15.37357130)
6.4646e-05 TDB
period 2034.906498503636
5.57
6.6161e-06
1.811e-08
d
yr
n .1769123054374858 5.752e-10 deg/d
Q 3.494472444575016 7.5744e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3663  
   data-arc span      62752 days (171.81 yr)  
   first obs. used      1849-05-26  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54124  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:43:21  

Additional Information
 Earth MOID = 1.77966 au 
 Jupiter MOID = 1.53461 au 
 T_jup = 3.197 
[ 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 5.55   n/a MPCxxxxx 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 13.828 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2020) Minor Planet Bull. 47, 133-135.]
[Vernazza, P.; Jorda, L.; Sevecek, P.; Broz, M.; et al. (2020) Nature Astronomy 4, 136-141.]
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 (A849 GA)          Discovered 1849-Apr-12 by De Gasparis, A. at Naples
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A849 GA = A900 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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