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16903 (1998 DD15)
Classification: Main-belt Asteroid          SPK-ID: 2016903
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2519048010134506 3.0552e-08  
a 2.611396879887796 1.035e-08 au
q 1.953573468492515 7.8586e-08 au
i 11.3915790677293 4.1021e-06 deg
node 179.5095316904968 1.8053e-05 deg
peri 268.8577708927066 2.0527e-05 deg
M 241.8277517253256 1.1984e-05 deg
tp 2459902.465314543870
(2022-Nov-18.96531454)
5.3552e-05 TDB
period 1541.373003350309
4.22
9.1632e-06
2.509e-08
d
yr
n .233558002649267 1.3885e-09 deg/d
Q 3.269220291283077 1.2957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      16188 days (44.32 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5156  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:05:32  

Additional Information
 Earth MOID = 1.00825 au 
 Jupiter MOID = 2.11203 au 
 T_jup = 3.337 
[ 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 14.37   n/a E2021B10  
diameter diameter 7.817 km 0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.862 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.060   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16903 (1998 DD15)          Discovered 1998-Feb-22 by JPL/GEODSS NEAT at Haleakala
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 DD15 = 1977 ES5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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