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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02960704630694269 3.4757e-08  
a 3.41331879437758 1.6019e-08 au
q 3.312260506772085 1.1571e-07 au
i 6.689400960499268 4.2274e-06 deg
node 242.6418846439799 3.4918e-05 deg
peri 235.4154932634464 8.6969e-05 deg
M 79.19033946329785 7.8038e-05 deg
tp 2458493.820411883094
(2019-Jan-10.32041188)
0.00050029 TDB
period 2303.369993844071
6.31
1.6214e-05
4.439e-08
d
yr
n .1562927367127847 1.1002e-09 deg/d
Q 3.514377081983074 1.6493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3548  
   data-arc span      43954 days (120.34 yr)  
   first obs. used      1900-04-26  
   last obs. used      2020-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36392  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:46  

Additional Information
 Earth MOID = 2.33479 au 
 Jupiter MOID = 1.5862 au 
 T_jup = 3.133 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456061.5 (2012-May-14.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03199187807952787 3.48e-08  
q 3.305027475200884 1.1599e-07 au
tp 2456178.515414255561
(2012-Sep-08.01541426)
0.00046668 TDB
node 242.6771115255243 3.4905e-05 deg
peri 233.8296349317943 8.1488e-05 deg
i 6.690079392592365 4.2284e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3548  
   data-arc span      43954 days (120.34 yr)  
   first obs. used      1900-04-26  
   last obs. used      2020-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36392  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:46  

Additional Information
 Jupiter MOID = 1.5862 au 
 T_jup = 3.133 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.211074785449958E-15 -4.00382259754563E-15 -1.380667329916932E-12 2.943200632732957E-15 -2.233922499530806E-13 1.823303606477741E-15
q -4.00382259754563E-15 1.345446030496913E-14 2.875296382167125E-12 6.643171426038825E-15 4.493764661920924E-13 -5.675017367563486E-15
tp -1.380667329916932E-12 2.875296382167125E-12 2.177924541842479E-7 -1.381840393154951E-10 3.440234597451643E-8 -8.774670181718375E-12
node 2.943200632732957E-15 6.643171426038825E-15 -1.381840393154951E-10 1.218387479164529E-9 -1.229642409944297E-9 -1.549610526618729E-11
peri -2.233922499530806E-13 4.493764661920924E-13 3.440234597451643E-8 -1.229642409944297E-9 6.640370870569333E-9 1.402976349584501E-11
i 1.823303606477741E-15 -5.675017367563486E-15 -8.774670181718375E-12 -1.549610526618729E-11 1.402976349584501E-11 1.787897460209654E-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. 2020-October); 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]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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