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272 Antonia (A888 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000272
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02830628737250038 2.9715e-08  
a 2.776766390641314 8.7433e-09 au
q 2.69816644322152 8.4794e-08 au
i 4.432700111887184 4.0927e-06 deg
node 37.3156117010337 4.4798e-05 deg
peri 69.20367554578741 9.1175e-05 deg
M 283.3730101342932 7.955e-05 deg
tp 2459560.238324654188
(2021-Dec-11.73832465)
0.00037356 TDB
period 1690.08070266722
4.63
7.9824e-06
2.185e-08
d
yr
n .2130075797160821 1.0061e-09 deg/d
Q 2.855366338061108 8.9908e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3296  
   data-arc span      37437 days (102.50 yr)  
   first obs. used      1918-09-06  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:36:55  

Additional Information
 Earth MOID = 1.71885 au 
 Jupiter MOID = 2.16352 au 
 T_jup = 3.330 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456531.5 (2013-Aug-27.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02747057481836689 2.8972e-08  
q 2.700845432317912 8.2575e-08 au
tp 2456148.689752658807
(2012-Aug-09.18975266)
0.00038997 TDB
node 37.42413062893872 4.4668e-05 deg
peri 62.97087153358395 9.4469e-05 deg
i 4.440285982627821 4.0981e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3296  
   data-arc span      37437 days (102.50 yr)  
   first obs. used      1918-09-06  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:36:55  

Additional Information
 Jupiter MOID = 2.16352 au 
 T_jup = 3.330 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.393814291710471E-16 -2.380136785484949E-15 6.890030622290411E-13 8.116577281717542E-16 1.723723678985264E-13 6.015949587785085E-17
q -2.380136785484949E-15 6.818641033519582E-15 -1.746764863368621E-12 -4.073103973003227E-15 -4.407185443529523E-13 -4.002412712397287E-17
tp 6.890030622290411E-13 -1.746764863368621E-12 1.520746100935478E-7 1.738879438897801E-11 3.247298675978952E-8 4.696117956468728E-12
node 8.116577281717542E-16 -4.073103973003227E-15 1.738879438897801E-11 1.99522094189393E-9 -1.985327852428243E-9 -5.880980855981455E-11
peri 1.723723678985264E-13 -4.407185443529523E-13 3.247298675978952E-8 -1.985327852428243E-9 8.924451515008475E-9 5.964749861322695E-11
i 6.015949587785085E-17 -4.002412712397287E-17 4.696117956468728E-12 -5.880980855981455E-11 5.964749861322695E-11 1.679431587078202E-11

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 10.68   n/a E2021B10  
diameter diameter 26.870 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.8548 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2008) Minor Planet Bull. 35, 135-138.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.128   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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 (A888 CA)          Discovered 1888-Feb-04 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A888 CA = 1944 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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