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383 Janina (A894 BC)
Classification: Main-belt Asteroid          SPK-ID: 2000383
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1675172781386776 3.2524e-08  
a 3.137618334723391 1.1826e-08 au
q 2.612013051452519 1.0377e-07 au
i 2.659587030817279 3.7229e-06 deg
node 92.77947111129787 8.2685e-05 deg
peri 324.4957030376851 8.3443e-05 deg
M 322.1001023479645 1.1772e-05 deg
tp 2459214.214571602608
(2020-Dec-30.71457160)
6.6675e-05 TDB
period 2030.011966874182
5.56
1.1477e-05
3.142e-08
d
yr
n .1773388560631635 1.0026e-09 deg/d
Q 3.663223617994264 1.3807e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3296  
   data-arc span      46156 days (126.37 yr)  
   first obs. used      1894-01-30  
   last obs. used      2020-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47604  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:03  

Additional Information
 Earth MOID = 1.62473 au 
 Jupiter MOID = 1.68628 au 
 T_jup = 3.188 
[ 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 9.9   n/a MPO502156 IRAS observations used: 10
diameter diameter 43.482 km 0.475 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.4 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.]
geometric albedo albedo 0.040   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
B-V BV 0.682   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.18, mean=11.79, max.=18.24) deg.
U-B UB 0.352   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.18, mean=11.79, max.=18.24) deg.
Tholen spectral type spec_T B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B B   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)

383 Janina (A894 BC)          Discovered 1894-Jan-29 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A894 BC = 1925 QC = 1936 QQ1 = 1936 RO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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