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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .252960271505787 3.1343e-08  
a 2.609371680005679 1.0286e-08 au
q 1.949304311371931 8.0443e-08 au
i 11.38482224670179 4.2206e-06 deg
node 179.5851930193771 1.8339e-05 deg
peri 268.8303971257423 2.0803e-05 deg
M 196.0255957817277 1.1745e-05 deg
tp 2459901.754893088639
(2022-Nov-18.25489309)
5.3251e-05 TDB
period 1539.580294348028
4.22
9.1033e-06
2.492e-08
d
yr
n .2338299608806377 1.3826e-09 deg/d
Q 3.269439048639427 1.2888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      15866 days (43.44 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:46:08  

Additional Information
 Earth MOID = 1.00372 au 
 Jupiter MOID = 2.11139 au 
 T_jup = 3.337 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457320.5 (2015-Oct-25.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2547704825930514 3.137e-08  
q 1.942340732230582 8.051e-08 au
tp 2456826.258535458124
(2014-Jun-17.75853546)
4.1417e-05 TDB
node 179.6640855791317 1.8345e-05 deg
peri 268.8120045457787 2.0758e-05 deg
i 11.38906595020997 4.2225e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      15866 days (43.44 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:46:08  

Additional Information
 Jupiter MOID = 2.11139 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.840645394002906E-16 -2.514721208917062E-15 1.509763796503889E-13 -3.952176625589649E-15 1.82007475920707E-14 1.348023309923247E-16
q -2.514721208917062E-15 6.481919746887014E-15 -2.422531818567061E-13 9.539766805948083E-15 -1.278900759423699E-14 -2.065055553514462E-16
tp 1.509763796503889E-13 -2.422531818567061E-13 1.715361133646576E-9 -1.629334700049887E-11 4.157287741526105E-10 -3.636417837029101E-12
node -3.952176625589649E-15 9.539766805948083E-15 -1.629334700049887E-11 3.365285912918537E-10 -3.329911745568353E-10 6.764466623727933E-12
peri 1.82007475920707E-14 -1.278900759423699E-14 4.157287741526105E-10 -3.329911745568353E-10 4.309053396749218E-10 -7.395773860075139E-12
i 1.348023309923247E-16 -2.065055553514462E-16 -3.636417837029101E-12 6.764466623727933E-12 -7.395773860075139E-12 1.78292249490305E-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 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

[ show close-approach data ]
Alternate Designations
 1998 DD15 = 1977 ES5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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