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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1679111325392876 9.2018e-09  
a 3.139037649433034 9.7164e-09 au
q 2.61195828263327 2.9022e-08 au
i 2.659449099853146 2.3169e-07 deg
node 92.78084986051825 1.5719e-05 deg
peri 324.5161564065223 1.8388e-05 deg
M 32.2897767718779 6.4892e-06 deg
tp 2459214.296902556791
(2020-Dec-30.79690256)
3.67e-05 TDB
period 2031.389549174031
5.56
9.4318e-06
2.582e-08
d
yr
n .1772185941127723 8.2283e-10 deg/d
Q 3.666117016232799 1.1348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3907  
   data-arc span      46477 days (127.25 yr)  
   first obs. used      1894-01-30  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44271  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:58:51  

Additional Information
 Earth MOID = 1.62427 au 
 Jupiter MOID = 1.68508 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 9.93   n/a E2021B10 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. 2020-October); Warner et al., 2009 Published Reference List:
[Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
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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