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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07074210835317722 3.7083e-08  
a 2.345419208779147 5.4311e-09 au
q 2.17949930897807 8.6019e-08 au
i 6.069520364312787 3.4747e-06 deg
node 134.8903634246171 3.7254e-05 deg
peri 84.56139059574666 4.4582e-05 deg
M 210.6712923254886 2.4886e-05 deg
tp 2459544.714299914426
(2021-Nov-26.21429991)
9.0957e-05 TDB
period 1311.985826571471
3.59
4.5571e-06
1.248e-08
d
yr
n .2743932081497901 9.5308e-10 deg/d
Q 2.511339108580224 5.8153e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3074  
   data-arc span      46706 days (127.87 yr)  
   first obs. used      1892-03-19  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46384  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:29  

Additional Information
 Earth MOID = 1.18178 au 
 Jupiter MOID = 2.46914 au 
 T_jup = 3.550 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456122.5 (2012-Jul-14.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07150660787980391 3.7292e-08  
q 2.177186498254684 8.6581e-08 au
tp 2455607.332774246143
(2011-Feb-14.83277425)
8.8468e-05 TDB
node 135.0001675189461 3.7316e-05 deg
peri 84.10434223390519 4.4402e-05 deg
i 6.065023622964419 3.4726e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3074  
   data-arc span      46706 days (127.87 yr)  
   first obs. used      1892-03-19  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46384  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:29  

Additional Information
 Jupiter MOID = 2.46914 au 
 T_jup = 3.550 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.390700142863541E-15 -3.223522939127803E-15 -3.570874365567328E-13 -4.442445632129536E-15 -9.573069143899312E-14 -1.009652732281484E-15
q -3.223522939127803E-15 7.496236872228846E-15 8.416345997228679E-13 1.066055068008878E-14 2.265192703950379E-13 2.425487645266614E-15
tp -3.570874365567328E-13 8.416345997228679E-13 7.826520401218846E-9 6.910472445359025E-12 2.14569292548151E-9 1.715466609766524E-13
node -4.442445632129536E-15 1.066055068008878E-14 6.910472445359025E-12 1.392466957272931E-9 -1.382276978720292E-9 1.514540147506907E-11
peri -9.573069143899312E-14 2.265192703950379E-13 2.14569292548151E-9 -1.382276978720292E-9 1.971563806673642E-9 -1.505177543479096E-11
i -1.009652732281484E-15 2.425487645266614E-15 1.715466609766524E-13 1.514540147506907E-11 -1.505177543479096E-11 1.205911853654743E-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 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.871 h n/a LCDB (Rev. 2019-August); 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, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.044   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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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Alternate Designations
 A899 CA = A892 FA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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