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216907 (2009 JG)
Classification: Main-belt Asteroid          SPK-ID: 2216907
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07530991467622435 4.8042e-08  
a 2.589811032910828 2.4816e-08 au
q 2.394772584994769 1.3671e-07 au
i 15.33880267214015 5.1774e-06 deg
node 78.90264743884001 3.1602e-05 deg
peri 191.736572153811 7.0638e-05 deg
M 255.0763247966453 6.6677e-05 deg
tp 2459644.181719666556
(2022-Mar-05.68171967)
0.0002847 TDB
period 1522.301032349403
4.17
2.1881e-05
5.991e-08
d
yr
n .2364841068552674 3.3991e-09 deg/d
Q 2.784849480826887 2.6685e-08 au
  Orbit Determination Parameters
   # obs. used (total)      374  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      2002-10-31  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53963  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:42:06  

Additional Information
 Earth MOID = 1.37867 au 
 Jupiter MOID = 2.28807 au 
 T_jup = 3.366 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.79   n/a MPCxxxxx  
diameter diameter 2.477 km 0.559 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.90275 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.138   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

216907 (2009 JG)          Discovered 2009-May-02 by La Sagra at La Sagra
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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