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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2835396861054232 2.7525e-08  
a 2.540035447554724 7.3053e-09 au
q 1.819834594058409 6.7643e-08 au
i 7.7859215030946 1.1171e-06 deg
node 187.3883899569109 9.8461e-06 deg
peri 209.08957200413 8.2881e-06 deg
M 229.7769735327571 8.3954e-06 deg
tp 2459735.364010877652
(2022-Jun-04.86401088)
3.6091e-05 TDB
period 1478.625164378207
4.05
6.3789e-06
1.746e-08
d
yr
n .2434694124466545 1.0503e-09 deg/d
Q 3.260236301051038 9.3766e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3012  
   data-arc span      42572 days (116.56 yr)  
   first obs. used      1904-08-04  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:51:57  

Additional Information
 Earth MOID = .829631 au 
 Jupiter MOID = 2.18667 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456710.5 (2014-Feb-22.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2813899679117677 2.7535e-08  
q 1.826529615239025 6.749e-08 au
tp 2456777.690320509686
(2014-Apr-30.19032051)
2.8563e-05 TDB
node 187.4441414436952 9.8609e-06 deg
peri 209.2439905861061 8.2966e-06 deg
i 7.773545709584943 1.1157e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3012  
   data-arc span      42572 days (116.56 yr)  
   first obs. used      1904-08-04  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:51:57  

Additional Information
 Jupiter MOID = 2.18667 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.581664760718446E-16 -1.853847398318839E-15 6.032414959687995E-13 1.12904064412095E-14 5.647384088141209E-14 -8.385719127330481E-15
q -1.853847398318839E-15 4.554914063308521E-15 -1.46270913146885E-12 -2.533569313730876E-14 -1.364240887778282E-13 2.013303013336398E-14
tp 6.032414959687995E-13 -1.46270913146885E-12 8.158366161082084E-10 1.13112527223163E-10 1.996008904582552E-11 -1.896103481084871E-11
node 1.12904064412095E-14 -2.533569313730876E-14 1.13112527223163E-10 9.723643261274113E-11 -7.035738635147095E-11 -6.582629258425141E-12
peri 5.647384088141209E-14 -1.364240887778282E-13 1.996008904582552E-11 -7.035738635147095E-11 6.88339280043266E-11 2.974689132888868E-12
i -8.385719127330481E-15 2.013303013336398E-14 -1.896103481084871E-11 -6.582629258425141E-12 2.974689132888868E-12 1.244772886296711E-12

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 11.72   n/a E2021B10  
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

[ 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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