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22515 (1998 DJ15)
Classification: Main-belt Asteroid          SPK-ID: 2022515
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06748199104135993 3.9729e-08  
a 2.311234406088492 9.3386e-09 au
q 2.155267706602345 8.916e-08 au
i 6.58783788691166 4.3351e-06 deg
node 348.4408841455953 3.3456e-05 deg
peri 203.3581367501934 4.5283e-05 deg
M 149.2574325855647 3.1008e-05 deg
tp 2458668.394333267811
(2019-Jul-03.89433327)
0.00011006 TDB
period 1283.407041815313
3.51
7.7785e-06
2.13e-08
d
yr
n .2805033697577337 1.7001e-09 deg/d
Q 2.467201105574639 9.9688e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      11003 days (30.12 yr)  
   first obs. used      1990-11-22  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48011  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:12  

Additional Information
 Earth MOID = 1.15672 au 
 Jupiter MOID = 2.49682 au 
 T_jup = 3.572 
[ 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 14.94   n/a E2021B10  
diameter diameter 2.360 km 0.446 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.558 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.458   0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22515 (1998 DJ15)          Discovered 1998-Feb-22 by JPL/GEODSS NEAT at Haleakala
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DJ15 = 1991 FE7 = 1999 RO50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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