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JPL Small-Body Database Browser
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74138 (1998 QD75)
Classification: Main-belt Asteroid          SPK-ID: 2074138
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2564431581927643 4.0766e-08  
a 2.685970123161319 1.7694e-08 au
q 1.997171461966422 1.1602e-07 au
i 10.14407188638441 6.832e-06 deg
node 200.0580962979195 2.3526e-05 deg
peri 92.40037997979115 2.7706e-05 deg
M 8.942413668967413 1.5642e-05 deg
tp 2458960.560516101611
(2020-Apr-21.06051610)
6.9615e-05 TDB
period 1607.867264440742
4.40
1.5888e-05
4.35e-08
d
yr
n .2238990792098857 2.2125e-09 deg/d
Q 3.374768784356216 2.2232e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7560 days (20.70 yr)  
   first obs. used      1998-08-19  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59877  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:14:42  

Additional Information
 Earth MOID = 1.01277 au 
 Jupiter MOID = 1.96202 au 
 T_jup = 3.304 
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Orbital Elements at Epoch 2456656.5 (2013-Dec-30.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2543822024524166 4.0801e-08  
q 2.004590356830803 1.1579e-07 au
tp 2457353.656469213465
(2015-Nov-27.15646921)
6.2182e-05 TDB
node 200.1595404257041 2.3532e-05 deg
peri 92.26508710740701 2.7804e-05 deg
i 10.13637263902627 6.8289e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7560 days (20.70 yr)  
   first obs. used      1998-08-19  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59877  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:14:42  

Additional Information
 Jupiter MOID = 1.96202 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.664699925590552E-15 -4.700756461438575E-15 -5.901230908002874E-13 6.437259298755926E-15 -4.303417529260456E-14 -5.383166649285688E-15
q -4.700756461438575E-15 1.340792317100982E-14 1.907100743231091E-12 -2.136498773569962E-14 1.607281289690362E-13 1.82287888339051E-14
tp -5.901230908002874E-13 1.907100743231091E-12 3.866569994507132E-9 -2.501902822609872E-11 9.141911818163433E-10 1.339085350943905E-11
node 6.437259298755926E-15 -2.136498773569962E-14 -2.501902822609872E-11 5.537428072815084E-10 -5.49683259835998E-10 1.8664159231712E-11
peri -4.303417529260456E-14 1.607281289690362E-13 9.141911818163433E-10 -5.49683259835998E-10 7.730755855078048E-10 -1.542918700498808E-11
i -5.383166649285688E-15 1.82287888339051E-14 1.339085350943905E-11 1.8664159231712E-11 -1.542918700498808E-11 4.663429855850896E-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 15.1   n/a MPO436301  
diameter diameter 3.663 km 0.985 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.100   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74138 (1998 QD75)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QD75 = 2002 JC74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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