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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1672097170090664 3.2747e-08  
a 3.139727935354188 1.2314e-08 au
q 2.614734915798154 1.0407e-07 au
i 2.659582234419996 3.743e-06 deg
node 92.78023471343607 8.2965e-05 deg
peri 324.2493907685816 8.3728e-05 deg
M 251.407183529778 1.1733e-05 deg
tp 2459213.464113177112
(2020-Dec-29.96411318)
6.7046e-05 TDB
period 2032.059651056855
5.56
1.1954e-05
3.273e-08
d
yr
n .1771601536464579 1.0422e-09 deg/d
Q 3.664720954910222 1.4373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3216  
   data-arc span      45957 days (125.82 yr)  
   first obs. used      1894-01-30  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48117  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:06:03  

Additional Information
 Earth MOID = 1.62702 au 
 Jupiter MOID = 1.68513 au 
 T_jup = 3.187 
[ 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 9.91   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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-January); 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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