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12849 (1997 QD2)
Classification: Main-belt Asteroid          SPK-ID: 2012849
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06704229182483351 3.7536e-08  
a 3.00635751979173 1.6161e-08 au
q 2.80480442162007 1.1263e-07 au
i 10.91411864050659 4.7354e-06 deg
node 142.8949199051119 2.2305e-05 deg
peri 91.18247882070217 4.2643e-05 deg
M 160.9136778732733 3.6917e-05 deg
tp 2457749.460286805360
(2016-Dec-26.96028681)
0.00019458 TDB
period 1903.966777711426
5.21
1.5352e-05
4.203e-08
d
yr
n .1890789294300193 1.5246e-09 deg/d
Q 3.207910617963389 1.7244e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2199  
   data-arc span      25719 days (70.41 yr)  
   first obs. used      1949-05-29  
   last obs. used      2019-10-28  
   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 03:38:59  

Additional Information
 Earth MOID = 1.8214 au 
 Jupiter MOID = 1.86787 au 
 T_jup = 3.220 
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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 12.0   n/a MPO324428  
diameter diameter 13.396 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.277 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.171   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12849 (1997 QD2)          Discovered 1997-Aug-27 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 QD2 = 1949 KQ = 1990 HA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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