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421 Zahringia (A896 RE)
Classification: Main-belt Asteroid          SPK-ID: 2000421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .283416957413549 2.4556e-08  
a 2.540915868253416 6.4259e-09 au
q 1.820777223829227 6.0887e-08 au
i 7.785568426741149 1.1038e-06 deg
node 187.3748529573078 9.8277e-06 deg
peri 209.0311872634027 8.2185e-06 deg
M 277.5682679415343 7.7763e-06 deg
tp 2459735.247251093273
(2022-Jun-04.74725109)
3.2788e-05 TDB
period 1479.394006995806
4.05
5.612e-06
1.536e-08
d
yr
n .2433428811375606 9.2312e-10 deg/d
Q 3.261054512677606 8.2472e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3186  
   data-arc span      42736 days (117.00 yr)  
   first obs. used      1904-08-04  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:35:49  

Additional Information
 Earth MOID = .830985 au 
 Jupiter MOID = 2.18701 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456790.5 (2014-May-13.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .281384350376091 2.4539e-08  
q 1.826527080691769 6.0588e-08 au
tp 2456777.697001365895
(2014-Apr-30.19700137)
2.6744e-05 TDB
node 187.4440458246438 9.8445e-06 deg
peri 209.2469942403902 8.2246e-06 deg
i 7.773562084614529 1.1021e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3186  
   data-arc span      42736 days (117.00 yr)  
   first obs. used      1904-08-04  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43802  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:35:49  

Additional Information
 Jupiter MOID = 2.18701 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.021556596330715E-16 -1.482904203516553E-15 4.786861936293613E-13 1.013276200840892E-14 4.359675257297822E-14 -6.585864925459507E-15
q -1.482904203516553E-15 3.670959239754024E-15 -1.167134130672857E-12 -2.257719478055221E-14 -1.060545143231051E-13 1.586073358833317E-14
tp 4.786861936293613E-13 -1.167134130672857E-12 7.15248584424634E-10 1.116077886953036E-10 9.96509760861343E-12 -1.742028767671639E-11
node 1.013276200840892E-14 -2.257719478055221E-14 1.116077886953036E-10 9.691370338652437E-11 -7.027311660849829E-11 -6.516134253830123E-12
peri 4.359675257297822E-14 -1.060545143231051E-13 9.96509760861343E-12 -7.027311660849829E-11 6.764458740236597E-11 3.09463435291189E-12
i -6.585864925459507E-15 1.586073358833317E-14 -1.742028767671639E-11 -6.516134253830123E-12 3.09463435291189E-12 1.214714344893547E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.71   n/a MPO636066  
diameter diameter 14.119 km 0.320 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.42 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2010) Minor Planet Bull. 37, 127-130.]
geometric albedo albedo 0.172   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.848   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.56 deg.
U-B UB 0.452   0.053 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.56 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

421 Zahringia (A896 RE)          Discovered 1896-Sep-07 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A896 RE = 1949 WJ = A908 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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