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420 Bertholda (A896 RC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000420
[ 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 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0296070462720081 3.4797e-08  
a 3.4133187943346 1.6031e-08 au
q 3.312260506849621 1.1588e-07 au
i 6.689400847701726 4.2289e-06 deg
node 242.6418827235285 3.4966e-05 deg
peri 235.4154953456818 8.7e-05 deg
M 79.19033929147626 7.8045e-05 deg
tp 2458493.820412992021
(2019-Jan-10.32041299)		 0.00050033 TDB
period 2303.369993800565
6.31		 1.6227e-05
4.443e-08		 d
yr
n .1562927367157368 1.1011e-09 deg/d
Q 3.514377081819579 1.6506e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3522  
   data-arc span      43929 days (120.27 yr)  
   first obs. used      1900-04-26  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:15:43  

Additional Information
 Earth MOID = 2.33479 au 
 Jupiter MOID = 1.5862 au 
 T_jup = 3.133 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456048.5 (2012-May-01.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03203641057736314 3.4844e-08  
q 3.305045351795254 1.1617e-07 au
tp 2456178.258542906757
(2012-Sep-07.75854291)		 0.00046605 TDB
node 242.6767383715833 3.4953e-05 deg
peri 233.787608242247 8.142e-05 deg
i 6.690013269691891 4.2298e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3522  
   data-arc span      43929 days (120.27 yr)  
   first obs. used      1900-04-26  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:15:43  

Additional Information
 Jupiter MOID = 1.5862 au 
 T_jup = 3.133 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.21411364211492E-15 -4.014894885232705E-15 -1.367015543290351E-12 2.917127025416413E-15 -2.209881091629902E-13 1.829816728075521E-15
q -4.014894885232705E-15 1.349498538205865E-14 2.841613050161571E-12 6.700417346987794E-15 4.430883721198491E-13 -5.689432447860589E-15
tp -1.367015543290351E-12 2.841613050161571E-12 2.17204974438783E-7 -1.396299077123606E-10 3.431004843887383E-8 -8.841370300379419E-12
node 2.917127025416413E-15 6.700417346987794E-15 -1.396299077123606E-10 1.221692305685646E-9 -1.233147941440972E-9 -1.529631131945829E-11
peri -2.209881091629902E-13 4.430883721198491E-13 3.431004843887383E-8 -1.233147941440972E-9 6.629143598106521E-9 1.382151160570784E-11
i 1.829816728075521E-15 -5.689432447860589E-15 -8.841370300379419E-12 -1.529631131945829E-11 1.382151160570784E-11 1.789146932433471E-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 8.4   n/a MPO384747  
diameter diameter 138.699 km 3.446 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.04 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Zappala, V.; Di Martino, M.; Cellino, A.; Farinella, P.; et al. (1989) Icarus 82, 354-368.]
[Lagerkvist, C.-I.; Erikson, A.; Lahulla, F.; Di Martino, M.; et al. (2001) Icarus 149, 190-197.]
[Behrend, R. (2003) 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 0.691   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.23, mean=5.51, max.=6.93) deg.
U-B UB 0.229   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.23, mean=5.51, max.=6.93) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

420 Bertholda (A896 RC)          Discovered 1896-Sep-07 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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