Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02960704554456774 3.7905e-08  
a 3.413318794895946 1.6791e-08 au
q 3.312260509877333 1.2877e-07 au
i 6.689401827350993 4.485e-06 deg
node 242.6418888628169 3.6593e-05 deg
peri 235.4154891168641 8.767e-05 deg
M 79.19033924175332 7.8134e-05 deg
tp 2458493.820413185170
(2019-Jan-10.32041319)
0.00050085 TDB
period 2303.369994368775
6.31
1.6996e-05
4.653e-08
d
yr
n .1562927366771815 1.1532e-09 deg/d
Q 3.514377079914559 1.7288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3164  
   data-arc span      43747 days (119.77 yr)  
   first obs. used      1900-04-26  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37976  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:26:47  

Additional Information
 Earth MOID = 2.33479 au 
 Jupiter MOID = 1.5862 au 
 T_jup = 3.133 
[ show covariance matrix ]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-27 17:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin