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74242 (1998 SY54)
Classification: Main-belt Asteroid          SPK-ID: 2074242
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2225995171734872 5.3714e-08  
a 2.60025527668946 8.5386e-09 au
q 2.021439707570574 1.3988e-07 au
i 9.62357927437696 6.0132e-06 deg
node 6.585839306537295 1.8685e-05 deg
peri 20.16220596760061 2.1823e-05 deg
M 92.53162653410962 8.2428e-06 deg
tp 2458806.850139414015
(2019-Nov-19.35013941)
3.523e-05 TDB
period 1531.519061309433
4.19
7.5437e-06
2.065e-08
d
yr
n .2350607374695053 1.1578e-09 deg/d
Q 3.179070845808347 1.0439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1154  
   data-arc span      10525 days (28.82 yr)  
   first obs. used      1992-03-26  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48895  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:56:47  

Additional Information
 Earth MOID = 1.02678 au 
 Jupiter MOID = 2.30047 au 
 T_jup = 3.360 
[ 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 15.05   n/a E2021B10  

74242 (1998 SY54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20040415/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
1907-Jul-20 00:38 < 00:01 Ceres 0.0464071816263215 0.0464037034574598 0.0464106705261757 6.21249921657655 6.21249775123057 2417776.526400483 0.409305893471 1181.92864676817 54.8106618654911 -81.9897067077149 124988.910359393 T 22 CATAB v2.0f-lin.ifort 2021-Feb-24 06:56:49 2021-Feb-24 06:56
2142-May-13 14:13 < 00:01 Ceres 0.046484187770936 0.0464530704439162 0.0465153052458209 6.0362514301449 6.03624992451181 2503542.092216312 0.936103023795215 1550.56612860491 52.7762586182017 -4.59650131579488 11416.5016093287 T 22 CATAB v2.0f-lin.ifort 2021-Feb-24 06:56:49 2021-Feb-24 06:56

Alternate Designations
 1998 SY54 = 2000 EJ35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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