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
JPL Small-Body Database Browser
Search: [ help ]  
20246 Frappa (1998 ER6)
Classification: Main-belt Asteroid          SPK-ID: 2020246
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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08314956031207936 4.95e-08  
a 2.295192008089229 6.9462e-09 au
q 2.104347801784811 1.1192e-07 au
i 4.080235527771936 4.7919e-06 deg
node 336.6605023987045 4.338e-05 deg
peri 201.9979413208756 4.6258e-05 deg
M 243.9856185630374 1.7349e-05 deg
tp 2459805.794858782741
6.1685e-05 TDB
period 1270.067963443381
n .2834493982699759 1.2867e-09 deg/d
Q 2.486036214393647 7.5237e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1567  
   data-arc span      24718 days (67.67 yr)  
   first obs. used      1953-05-11  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:11:09  

Additional Information
 Earth MOID = 1.10943 au 
 Jupiter MOID = 2.47801 au 
 T_jup = 3.587 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.04   n/a E2021B10  
diameter diameter 2.408 km 0.984 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 9.304 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.231   0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

20246 Frappa           Discovered 1998 Mar. 1 by the OCA-DLR Asteroid Survey at Caussols.
Eric Frappa (b. 1969) is a specialist in the occultation of stars by minor planets. He is responsible for the Euraster web site, which collects occultation data for Europe. He spends several observing missions every year at the Pic du Midi. He works at the planetarium in Saint-Etienne, where he creates digital planetarium shows.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

Alternate Designations
 1998 ER6 = 1977 DN = 1991 EJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-Jul-25 18:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin