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JPL Small-Body Database Browser
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74994 (1999 TH271)
Classification: Main-belt Asteroid          SPK-ID: 2074994
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 .2243554145063064 4.9061e-08  
a 2.263735438909388 1.2189e-08 au
q 1.755854136180257 1.1082e-07 au
i 5.356806841840397 5.4247e-06 deg
node 302.1996530818049 6.2906e-05 deg
peri 2.105844516702402 6.4585e-05 deg
M 322.4999064885504 1.852e-05 deg
tp 2458730.088595072683
(2019-Sep-03.58859507)
6.4557e-05 TDB
period 1244.047410493042
3.41
1.0048e-05
2.751e-08
d
yr
n .2893780389425228 2.3373e-09 deg/d
Q 2.771616741638518 1.4924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      585  
   data-arc span      9250 days (25.33 yr)  
   first obs. used      1994-01-07  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58057  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:42:21  

Additional Information
 Earth MOID = .739885 au 
 Jupiter MOID = 2.47332 au 
 T_jup = 3.579 
[ 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 15.8   n/a MPO436308  

74994 (1999 TH271)          Discovered 1999-Oct-03 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TH271 = 1994 AT7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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