Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
272 Antonia
Classification: Main-belt Asteroid          SPK-ID: 2000272
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02723022229634354 3.8096e-08  
a 2.778311918667886 1.35e-08 AU
q 2.702657867513979 1.0476e-07 AU
i 4.439234962476876 5.1796e-06 deg
node 37.41943806089034 5.7314e-05 deg
peri 63.72275840363033 0.00011191 deg
M 180.619442272214 9.6846e-05 deg
tp 2457843.335460033024
(2017-Mar-30.83546003)
0.00045561 JED
period 1691.491928976697
4.63
1.2328e-05
3.375e-08
d
yr
n .2128298656546292 1.5512e-09 deg/d
Q 2.853965969821794 1.3867e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1596  
   data-arc span      35329 days (96.73 yr)  
   first obs. used      1918-09-06  
   last obs. used      2015-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52131  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:34:10  

Additional Information
 Earth MOID = 1.7229 AU 
 T_jup = 3.329 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.6 mag n/a MPO263345  
diameter diameter 25.35 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 3.8548 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2008) Minor Planet Bul. 35, 135-138.]
geometric albedo albedo 0.1443   0.017 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

272 Antonia          Discovered 1888-Feb-04 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1944 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Sep-01 14:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin