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70657 (1999 TW258)
Classification: Main-belt Asteroid          SPK-ID: 2070657
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01056669031945474 4.2283e-08  
a 2.540782635585853 1.3203e-08 au
q 2.513934972306569 1.0533e-07 au
i 4.593338191843742 4.8438e-06 deg
node 25.89764880075572 5.2991e-05 deg
peri 195.3017948420323 0.00024039 deg
M 189.6233705181528 0.00023404 deg
tp 2459700.595389431606
(2022-May-01.09538943)
0.00096069 TDB
period 1479.277650707552
4.05
1.1531e-05
3.157e-08
d
yr
n .2433620218812937 1.897e-09 deg/d
Q 2.567630298865137 1.3343e-08 au
  Orbit Determination Parameters
   # obs. used (total)      645  
   data-arc span      9155 days (25.07 yr)  
   first obs. used      1995-09-19  
   last obs. used      2020-10-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58335  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:59:45  

Additional Information
 Earth MOID = 1.50479 au 
 Jupiter MOID = 2.39022 au 
 T_jup = 3.441 
[ 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 15.6   n/a MPO432259  

70657 (1999 TW258)          Discovered 1999-Oct-09 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2040-Feb-18 11:32 00:04 Psych 0.0324429669627985 0.0324394008786475 0.0324465343826606 2.75054843634463 2.75054830075911 2466202.980501385 4.20496366554064 380.106354621301 39.6628817273222 -62.7644932915389 108748.186759777 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 21:59:47 2020-Nov-12 21:59
2078-Mar-11 01:45 00:04 Amphi 0.0433059886961858 0.0433008156957841 0.043311167412149 1.86720170710209 1.86720163600795 2480103.573004694 3.94108891021588 841.854895254035 55.1610619293331 -72.5368599245563 111795.853644063 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 21:59:47 2020-Nov-12 21:59

Alternate Designations
 1999 TW258 = 2001 CQ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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