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JPL Small-Body Database Browser
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442 Eichsfeldia (A899 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000442
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0710132424417043 3.7122e-08  
a 2.344948751674594 5.5406e-09 au
q 2.178426337458554 8.6156e-08 au
i 6.06962526392695 3.6005e-06 deg
node 134.8951883792774 3.7301e-05 deg
peri 84.55435658125445 4.501e-05 deg
M 100.8879832410077 2.5313e-05 deg
tp 2458232.933942362488
9.2133e-05 TDB
period 1311.591098351136
n .2744757878065605 9.7278e-10 deg/d
Q 2.511471165890634 5.934e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2953  
   data-arc span      46644 days (127.70 yr)  
   first obs. used      1892-03-19  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:43:15  

Additional Information
 Earth MOID = 1.18081 au 
 Jupiter MOID = 2.47004 au 
 T_jup = 3.551 
[ 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 10.0   n/a MPO502157 IRAS observations used: 17
diameter diameter 62.171 km 1.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.871 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Koff, R.A.; Brincat, S.F. (2000) Minor Planet Bull. 27, 49-51.]
[Behrend, R. (2005) Observatoire de Geneve web site,]
geometric albedo albedo 0.044   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.692   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=14.65, mean=16.22, max.=17.79) deg.
U-B UB 0.331   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=14.65, mean=16.22, max.=17.79) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 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)

442 Eichsfeldia (A899 CA)          Discovered 1899-Feb-15 by Wolf, M. and Schwassmann, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2036-Dec-26 09:15 < 00:01 Thisb 0.0271798057704033 0.0271790922305861 0.0271805193811667 4.48323601796339 4.48323596200866 2465053.885462868 0.380470446699279 94.5869339819599 21.8198806476531 -72.2318322683914 177857.966481865 T 42 CATAB v2.0f-lin.ifort 2019-Dec-13 20:43:31 2019-Dec-13 20:43

Alternate Designations
 A899 CA = A892 FA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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