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 ]  
12580 Antonini (1999 RM33)
Classification: Main-belt Asteroid          SPK-ID: 2012580
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2469877588339807 4.9399e-08  
a 3.060297817547423 1.908e-08 au
q 2.304441718226863 1.5731e-07 au
i 2.555740168832016 5.3132e-06 deg
node 41.43319570755066 9.7608e-05 deg
peri 308.0580180291299 9.7939e-05 deg
M 238.522428436411 9.2317e-06 deg
tp 2459260.338369929698
(2021-Feb-14.83836993)
5.348e-05 TDB
period 1955.437617966763
5.35
1.8288e-05
5.007e-08
d
yr
n .1841020120981016 1.7218e-09 deg/d
Q 3.816153916867984 2.3793e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1041  
   data-arc span      14772 days (40.44 yr)  
   first obs. used      1978-11-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51511  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:03:51  

Additional Information
 Earth MOID = 1.29858 au 
 Jupiter MOID = 1.61581 au 
 T_jup = 3.185 
[ 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 14.2   n/a MPO347624  
diameter diameter 7.915 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.717 h n/a LCDB (Rev. 2019-January); 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 0.065   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12580 Antonini           Discovered 1999 Sept. 8 by L. Bernasconi at St. Michel sur Meurthe.
Pierre Antonini is a retired mathematics professor who has discovered many minor planets and a supernova at his private observatory, using first a 16-cm telescope, now a 30-cm telescope.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000726/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1999 RM33 = 1978 WG16 = 1994 VR8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-09 21:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin