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JPL Small-Body Database Browser
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74948 (1999 TJ181)
Classification: Main-belt Asteroid          SPK-ID: 2074948
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1669692526540036 4.0011e-08  
a 2.376166525980714 1.0574e-08 au
q 1.979419776956254 9.4185e-08 au
i .7361149329927809 4.5012e-06 deg
node 237.552444225943 0.00034928 deg
peri 187.6208490802411 0.00034957 deg
M 78.89778757662869 1.3977e-05 deg
tp 2458307.291834035315
(2018-Jul-07.79183404)
5.1287e-05 TDB
period 1337.869450962328
3.66
8.9299e-06
2.445e-08
d
yr
n .2690845506196829 1.7961e-09 deg/d
Q 2.772913275005174 1.2339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      555  
   data-arc span      8072 days (22.10 yr)  
   first obs. used      1997-01-31  
   last obs. used      2019-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51924  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 09:01:21  

Additional Information
 Earth MOID = .992681 au 
 Jupiter MOID = 2.52438 au 
 T_jup = 3.522 
[ 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 16.2   n/a MPO426456  
diameter diameter 1.994 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.093   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74948 (1999 TJ181)          Discovered 1999-Oct-11 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TJ181 = 1999 TK157 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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