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85756 (1998 SD157)
Classification: Main-belt Asteroid          SPK-ID: 2085756
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09549540291942703 4.4706e-08  
a 2.84200859172932 1.5152e-08 au
q 2.570609836161655 1.3062e-07 au
i 1.988230418804676 4.6773e-06 deg
node 20.00889371043829 0.00010578 deg
peri 340.763473608476 0.00010724 deg
M 198.3514995523651 1.8517e-05 deg
tp 2459786.288531532134
(2022-Jul-25.78853153)
9.206e-05 TDB
period 1749.993786321618
4.79
1.3995e-05
3.832e-08
d
yr
n .2057150161411136 1.6451e-09 deg/d
Q 3.113407347296985 1.6599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      7886 days (21.59 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56433  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:40:11  

Additional Information
 Earth MOID = 1.56748 au 
 Jupiter MOID = 2.31557 au 
 T_jup = 3.301 
[ 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 14.9   n/a MPO337904  

85756 (1998 SD157)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ 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
1997-Sep-03 04:03 < 00:01 Eunom 0.0499135920914549 0.0499127854855755 0.0499143987195207 4.04808559224043 4.04808552276594 2450694.668866776 0.725146219332831 150.784307416527 37.4768429761842 84.3083095218183 198118.584393278 T 24 CATAB v2.0f-lin.ifort 2020-May-20 15:40:28 2020-May-20 15:40

Alternate Designations
 1998 SD157 = 2001 FN192 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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