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JPL Small-Body Database Browser
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969 Leocadia (A921 VC)
Classification: Main-belt Asteroid          SPK-ID: 2000969
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2061364568132262 5.4132e-08  
a 2.462058900212326 9.3519e-09 au
q 1.954538802057088 1.2906e-07 au
i 2.292692339173365 3.9908e-06 deg
node 287.7558378573755 0.00010155 deg
peri 91.40476688170483 0.0001021 deg
M 97.37737575601261 1.432e-05 deg
tp 2458218.818025531346
(2018-Apr-10.31802553)
5.4522e-05 TDB
period 1411.061961178711
3.86
8.0397e-06
2.201e-08
d
yr
n .2551269964780844 1.4536e-09 deg/d
Q 2.969578998367563 1.128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      35618 days (97.52 yr)  
   first obs. used      1921-11-25  
   last obs. used      2019-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45943  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:59:24  

Additional Information
 Earth MOID = .957642 au 
 Jupiter MOID = 2.50007 au 
 T_jup = 3.459 
[ 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 12.57   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
diameter diameter 17.321 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.87 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:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.019   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.621   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.79, mean=6.12, max.=6.53) deg.
U-B UB 0.227   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.79, mean=6.12, max.=6.53) deg.
Tholen spectral type spec_T FXU:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

969 Leocadia (A921 VC)          Discovered 1921-Nov-05 by Belyavskij, S. at Simeis
Independent discovery Nov. 25 by K. Reinmuth, Heidelberg, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 VC = 1940 RV = 1944 SB = 1948 UG = 1963 PA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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