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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2835645319422889 3.5798e-08  
a 2.539855536137682 8.0717e-09 au
q 1.819642589831769 8.8902e-08 au
i 7.786190985542669 3.9135e-06 deg
node 187.3911714660837 2.3421e-05 deg
peri 209.1178409191803 2.5167e-05 deg
M 181.0302857319614 1.3401e-05 deg
tp 2459735.502800123880
(2022-Jun-05.00280012)
5.7416e-05 TDB
period 1478.468070012731
4.05
7.0479e-06
1.93e-08
d
yr
n .2434952822463728 1.1607e-09 deg/d
Q 3.260068482443595 1.036e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2961  
   data-arc span      42368 days (116.00 yr)  
   first obs. used      1904-08-04  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44241  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:15:43  

Additional Information
 Earth MOID = .830558 au 
 Jupiter MOID = 2.18565 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456668.5 (2014-Jan-11.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2814219907133114 3.5805e-08  
q 1.826540523141225 8.8755e-08 au
tp 2456777.680309869325
(2014-Apr-30.18030987)
4.9214e-05 TDB
node 187.4442244516777 2.3465e-05 deg
peri 209.2398123478249 2.5235e-05 deg
i 7.773400966520192 3.9087e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2961  
   data-arc span      42368 days (116.00 yr)  
   first obs. used      1904-08-04  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44241  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:15:43  

Additional Information
 Jupiter MOID = 2.18565 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.282005347113797E-15 -3.172091391194662E-15 5.576448940145137E-13 -8.489775411787148E-15 6.830774491113708E-14 4.826864674331177E-16
q -3.172091391194662E-15 7.877415427487991E-15 -1.269544510492507E-12 2.066657842187776E-14 -1.493979896029083E-13 -1.578622394468554E-15
tp 5.576448940145137E-13 -1.269544510492507E-12 2.422063488869903E-9 -1.945700915925375E-11 4.647863454354501E-10 -4.680634065415642E-12
node -8.489775411787148E-15 2.066657842187776E-14 -1.945700915925375E-11 5.506011742927694E-10 -5.486626847639392E-10 -4.672926535178662E-12
peri 6.830774491113708E-14 -1.493979896029083E-13 4.647863454354501E-10 -5.486626847639392E-10 6.368009549996469E-10 3.742077905554461E-12
i 4.826864674331177E-16 -1.578622394468554E-15 -4.680634065415642E-12 -4.672926535178662E-12 3.742077905554461E-12 1.527756956450211E-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 11.6   n/a MPO473767  
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. 2019-August); 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

[ show close-approach data ]
Alternate Designations
 A896 RE = 1949 WJ = A908 OB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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