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207 Hedda (A879 UA)
Classification: Main-belt Asteroid          SPK-ID: 2000207
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 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02979842858331288 3.2412e-08  
a 2.283625310846333 4.8672e-09 au
q 2.215576865110033 7.371e-08 au
i 3.802340994797153 3.7337e-06 deg
node 29.14866549524633 4.7139e-05 deg
peri 193.1622922712727 7.4148e-05 deg
M 131.6328230981239 5.6974e-05 deg
tp 2458739.609885052748
(2019-Sep-13.10988505)
0.00019951 TDB
period 1260.47924427882
3.45
4.0298e-06
1.103e-08
d
yr
n .2856056548602457 9.1309e-10 deg/d
Q 2.351673756582633 5.0123e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3552  
   data-arc span      50560 days (138.43 yr)  
   first obs. used      1882-09-09  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:28:58  

Additional Information
 Earth MOID = 1.20534 au 
 Jupiter MOID = 2.60936 au 
 T_jup = 3.600 
[ 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 10.12   n/a MPCxxxxx IRAS observations used: 9
diameter diameter 57.880 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 30.098 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2010) Minor Planet Bull. 37, 21-24.]
geometric albedo albedo 0.058   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.722   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.97, mean=8.10, max.=11.23) deg.
U-B UB 0.389   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.97, mean=8.10, max.=11.23) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   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)

207 Hedda (A879 UA)          Discovered 1879-Oct-17 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A879 UA = 1932 CL1 = 1934 XJ = 1953 BF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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