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
JPL Small-Body Database Browser
Search: [ help ]  
937 Bethgea (A920 RD)
Classification: Main-belt Asteroid          SPK-ID: 2000937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2175972265820593 3.0642e-08  
a 2.231888788050452 4.0154e-09 au
q 1.74623597773108 6.8394e-08 au
i 3.696276251671955 3.4063e-06 deg
node 243.5673733736062 5.5927e-05 deg
peri 72.39652162186465 5.6489e-05 deg
M 350.044592490336 9.4908e-06 deg
tp 2459034.179357181993
(2020-Jul-03.67935718)
3.2147e-05 TDB
period 1217.887723204474
3.33
3.2867e-06
8.998e-09
d
yr
n .2955937506724984 7.977e-10 deg/d
Q 2.717541598369824 4.8891e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3173  
   data-arc span      38083 days (104.27 yr)  
   first obs. used      1916-04-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41489  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:24:58  

Additional Information
 Earth MOID = .737068 au 
 Jupiter MOID = 2.58406 au 
 T_jup = 3.607 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456289.5 (2012-Dec-28.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2179560417852645 3.066e-08  
q 1.744987608336491 6.846e-08 au
tp 2456597.757372332219
(2013-Nov-01.25737233)
2.9814e-05 TDB
node 243.7474289302918 5.5903e-05 deg
peri 72.02711269243188 5.6461e-05 deg
i 3.697432173300749 3.4067e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3173  
   data-arc span      38083 days (104.27 yr)  
   first obs. used      1916-04-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41489  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:24:58  

Additional Information
 Jupiter MOID = 2.58406 au 
 T_jup = 3.607 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.400285157253115E-16 -2.096810372860366E-15 1.642724068597991E-13 2.439908128146168E-15 4.476339083922667E-14 -2.999582157146632E-16
q -2.096810372860366E-15 4.686780743337618E-15 -3.432564849275465E-13 -5.27169922231946E-15 -9.521570188187654E-14 6.794822641059477E-16
tp 1.642724068597991E-13 -3.432564849275465E-13 8.888921156144093E-10 4.063134125388023E-12 2.487608618851698E-10 -4.511417838359362E-13
node 2.439908128146168E-15 -5.27169922231946E-15 4.063134125388023E-12 3.12517305012968E-9 -3.117035075371831E-9 -2.067731678426794E-11
peri 4.476339083922667E-14 -9.521570188187654E-14 2.487608618851698E-10 -3.117035075371831E-9 3.187874846414784E-9 2.050487813172437E-11
i -2.999582157146632E-16 6.794822641059477E-16 -4.511417838359362E-13 -2.067731678426794E-11 2.050487813172437E-11 1.160591819512173E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO473775  
diameter diameter 11.383 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.5390 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.254   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.936   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.21 deg.
U-B UB 0.526   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.21 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

937 Bethgea (A920 RD)          Discovered 1920-Sep-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A920 RD = 1946 GC = 1959 EQ = A916 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-24 21:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin