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JPL Small-Body Database Browser
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49157 (1998 SQ54)
Classification: Main-belt Asteroid          SPK-ID: 2049157
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1762696839777772 4.4317e-08  
a 2.457860846949391 1.0444e-08 au
q 2.02461449219627 1.0841e-07 au
i 2.402946092122483 3.9382e-06 deg
node 228.6954259447219 0.00011893 deg
peri 68.08931997277182 0.00011949 deg
M 171.2243605287681 1.0679e-05 deg
tp 2457931.081953363378
(2017-Jun-26.58195336)
4.2062e-05 TDB
period 1407.454500311562
3.85
8.9711e-06
2.456e-08
d
yr
n .2557809150635481 1.6303e-09 deg/d
Q 2.891107201702512 1.2285e-08 au
  Orbit Determination Parameters
   # obs. used (total)      846  
   data-arc span      8237 days (22.55 yr)  
   first obs. used      1997-04-14  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57036  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:40:19  

Additional Information
 Earth MOID = 1.00952 au 
 Jupiter MOID = 2.30974 au 
 T_jup = 3.469 
[ 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 15.3   n/a MPO426259  

49157 (1998 SQ54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SQ54 = 1998 TL18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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