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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1969606573093304 3.6268e-08  
a 3.198458503296847 1.2794e-08 au
q 2.568488014110883 1.1645e-07 au
i 21.30998129316943 4.8302e-06 deg
node 292.0130783831619 1.1477e-05 deg
peri 81.62147403412472 1.6766e-05 deg
M 71.17140844263838 1.1374e-05 deg
tp 2458587.440545355938
(2019-Apr-13.94054536)
6.5848e-05 TDB
period 2089.341870924337
5.72
1.2537e-05
3.432e-08
d
yr
n .1723030610786228 1.0339e-09 deg/d
Q 3.828428992482811 1.5314e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2561  
   data-arc span      44222 days (121.07 yr)  
   first obs. used      1899-10-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36823  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:29  

Additional Information
 Earth MOID = 1.67022 au 
 Jupiter MOID = 2.00617 au 
 T_jup = 3.059 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456149.5 (2012-Aug-10.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1919479939943149 3.5842e-08  
q 2.585032713026735 1.1421e-07 au
tp 2456489.967236106109
(2013-Jul-16.46723611)
6.9772e-05 TDB
node 292.350982857983 1.142e-05 deg
peri 80.32205473601795 1.7232e-05 deg
i 21.37410348760144 4.8336e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2561  
   data-arc span      44222 days (121.07 yr)  
   first obs. used      1899-10-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36823  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:29  

Additional Information
 Jupiter MOID = 2.00617 au 
 T_jup = 3.059 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.284630625512578E-15 -4.077426977830577E-15 -2.824232596359959E-13 -1.6524556501382E-15 -7.013399866760762E-14 -8.318432803310677E-16
q -4.077426977830577E-15 1.304278240249543E-14 8.790447503414147E-13 6.098042564221029E-15 2.12246384607033E-13 3.679945252031415E-15
tp -2.824232596359959E-13 8.790447503414147E-13 4.868113426383798E-9 -1.64053898385959E-11 9.227003624164952E-10 -5.236304711176729E-12
node -1.6524556501382E-15 6.098042564221029E-15 -1.64053898385959E-11 1.30405318624561E-10 -1.237711647608762E-10 5.045710670012377E-12
peri -7.013399866760762E-14 2.12246384607033E-13 9.227003624164952E-10 -1.237711647608762E-10 2.969572443293265E-10 -5.515031995053015E-12
i -8.318432803310677E-16 3.679945252031415E-15 -5.236304711176729E-12 5.045710670012377E-12 -5.515031995053015E-12 2.336352510562545E-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 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-August); 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1995-Nov-29 03:46 00:01 Inter 0.0385633200900273 0.0385621739401401 0.0385644662478233 1.98381793835275 1.98381774699657 2450050.656844876 1.26421126510737 66.5822205972449 34.4970642517142 -37.2686427233533 122080.851440609 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:29:37 2020-Nov-13 04:29
2172-Jul-26 21:21 00:07 Inter 0.0494995788525279 0.0494952155736107 0.0495039442036857 2.02115551693365 2.021155370609 2514574.389880433 6.86355400970912 556.189505368379 39.726255371287 67.3709266030788 171543.6441798 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:29:37 2020-Nov-13 04:29

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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