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JPL Small-Body Database Browser
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445 Edna (A899 TC)
Classification: Main-belt Asteroid          SPK-ID: 2000445
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1966320511526645 3.8383e-08  
a 3.197366070913127 1.3501e-08 au
q 2.568661422103543 1.2435e-07 au
i 21.30888191073117 4.9626e-06 deg
node 292.0164901540849 1.2265e-05 deg
peri 81.6011575151626 1.7433e-05 deg
M 2.270505881710435 1.1722e-05 deg
tp 2458587.329353285424
(2019-Apr-13.82935329)
6.7987e-05 TDB
period 2088.271541351549
5.72
1.3226e-05
3.621e-08
d
yr
n .1723913738569672 1.0919e-09 deg/d
Q 3.82607071972271 1.6155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2223  
   data-arc span      43893 days (120.17 yr)  
   first obs. used      1899-10-04  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38934  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:43:15  

Additional Information
 Earth MOID = 1.66959 au 
 Jupiter MOID = 2.00422 au 
 T_jup = 3.059 
[ 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 9.2   n/a MPO502157 IRAS observations used: 25
diameter diameter 87.812 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 19.959 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Malcolm, G. (2002) Minor Planet Bull. 29, 28-29.]
[Pilcher, F. (2019) Minor Planet Bull. 46, 58-60.]
geometric albedo albedo 0.044   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.684   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=18.87, mean=19.14, max.=19.41) deg.
U-B UB 0.368   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=18.87, mean=19.14, max.=19.41) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

445 Edna (A899 TC)          Discovered 1899-Oct-02 by Coddington, E. F. at Mount Hamilton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A899 TC = 1978 PJ5 = A918 CB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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