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297 Caecilia (A890 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000297
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402916252084649 4.0663e-08  
a 3.166011036504215 1.5377e-08 au
q 2.721846202765102 1.3067e-07 au
i 7.552816820881541 4.5765e-06 deg
node 331.887411095665 3.0472e-05 deg
peri 353.3685590363351 3.3685e-05 deg
M 2.634291195681446 1.5742e-05 deg
tp 2458985.443350414346
(2020-May-15.94335041)
8.9939e-05 TDB
period 2057.628959061769
5.63
1.4991e-05
4.104e-08
d
yr
n .1749586573490643 1.2747e-09 deg/d
Q 3.610175870243328 1.7535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      4009  
   data-arc span      43923 days (120.25 yr)  
   first obs. used      1900-05-02  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:13:48  

Additional Information
 Earth MOID = 1.71021 au 
 Jupiter MOID = 1.73129 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455938.5 (2012-Jan-12.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1437245700785765 4.0344e-08  
q 2.708268391174585 1.3e-07 au
tp 2456935.525479842142
(2014-Oct-05.02547984)
8.542e-05 TDB
node 332.1397899848999 3.0489e-05 deg
peri 354.5812621091511 3.3598e-05 deg
i 7.555272087282046 4.5769e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      4009  
   data-arc span      43923 days (120.25 yr)  
   first obs. used      1900-05-02  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:13:48  

Additional Information
 Jupiter MOID = 1.73129 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.627620549556887E-15 -5.219530575790244E-15 8.113298190738046E-14 -1.742082064088571E-15 2.224617978209481E-14 -6.218355841159792E-17
q -5.219530575790244E-15 1.690013582042747E-14 -1.304302236630062E-13 5.777718008191559E-15 -6.678593107042774E-14 3.922379658830621E-16
tp 8.113298190738046E-14 -1.304302236630062E-13 7.296604611538574E-9 -6.676533478773576E-12 1.222206460543453E-9 1.24284182994344E-12
node -1.742082064088571E-15 5.777718008191559E-15 -6.676533478773576E-12 9.295545392198818E-10 -9.222342377224478E-10 -2.309148621129189E-12
peri 2.224617978209481E-14 -6.678593107042774E-14 1.222206460543453E-9 -9.222342377224478E-10 1.128855491766645E-9 2.45153350149251E-12
i -6.218355841159792E-17 3.922379658830621E-16 1.24284182994344E-12 -2.309148621129189E-12 2.45153350149251E-12 2.09481077927425E-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 9.1   n/a MPO435697  
diameter diameter 39.48 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 4.163 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Cooney, W.R. (2005) Minor Planet Bull. 32, 15-16.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submissions_results.htm]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1796   0.018 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

297 Caecilia (A890 RA)          Discovered 1890-Sep-09 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A890 RA = 1935 PB = 1947 SB = 1955 BK1 = A924 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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