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343 Ostara (A892 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000343
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291772208613804 2.6658e-08  
a 2.411900325740072 5.5152e-09 au
q 1.859147712092304 6.5208e-08 au
i 3.259185951650709 3.2872e-06 deg
node 38.59011094362342 6.5334e-05 deg
peri 10.28268374738096 6.5875e-05 deg
M 24.08483162055436 8.7857e-06 deg
tp 2458908.966814907642
(2020-Feb-29.46681491)
3.3316e-05 TDB
period 1368.161802099845
3.75
4.6928e-06
1.285e-08
d
yr
n .2631267730523353 9.0253e-10 deg/d
Q 2.96465293938784 6.7792e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2964  
   data-arc span      46752 days (128.00 yr)  
   first obs. used      1892-11-15  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:53  

Additional Information
 Earth MOID = .869438 au 
 Jupiter MOID = 2.4269 au 
 T_jup = 3.481 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456560.5 (2013-Sep-25.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2295190921445435 2.6719e-08  
q 1.857791650059287 6.5352e-08 au
tp 2456169.582351738228
(2012-Aug-30.08235174)
3.206e-05 TDB
node 38.64140062463026 6.5169e-05 deg
peri 9.65114228649696 6.5719e-05 deg
i 3.265919503647361 3.292e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2964  
   data-arc span      46752 days (128.00 yr)  
   first obs. used      1892-11-15  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40215  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:53  

Additional Information
 Jupiter MOID = 2.4269 au 
 T_jup = 3.481 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.138949983430915E-16 -1.742566986040783E-15 -1.278078939460035E-13 -1.836931405076523E-16 -3.768119069953746E-14 -1.063229258909126E-16
q -1.742566986040783E-15 4.270845527891387E-15 3.079412225372334E-13 3.485348840268691E-16 9.167756399340923E-14 3.008116898366296E-16
tp -1.278078939460035E-13 3.079412225372334E-13 1.027854358935196E-9 -3.204381795983603E-12 2.869840283320906E-10 -1.852583537532723E-13
node -1.836931405076523E-16 3.485348840268691E-16 -3.204381795983603E-12 4.246934676181965E-9 -4.24059076865963E-9 -4.511989746379936E-11
peri -3.768119069953746E-14 9.167756399340923E-14 2.869840283320906E-10 -4.24059076865963E-9 4.318998062081609E-9 4.500542420110974E-11
i -1.063229258909126E-16 3.008116898366296E-16 -1.852583537532723E-13 -4.511989746379936E-11 4.500542420110974E-11 1.083743800855815E-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 11.7   n/a MPO502156 IRAS observations used: 5
diameter diameter 18.213 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 109.87 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2009) Minor Planet Bull. 36, 59-62.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.092   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.770   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.66, mean=7.55, max.=8.45) deg.
U-B UB 0.463   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.66, mean=7.55, max.=8.45) deg.
Tholen spectral type spec_T CSGU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

343 Ostara (A892 VA)          Discovered 1892-Nov-15 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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