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3774 Megumi (1987 YC)
Classification: Main-belt Asteroid          SPK-ID: 2003774
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0508299574695856 1.2556e-08  
a 3.005001747927664 1.3374e-08 au
q 2.852257636884471 3.4551e-08 au
i 9.208987267468189 5.9388e-07 deg
node 292.0723257111385 4.8814e-06 deg
peri 277.3466197409748 2.4943e-05 deg
M 20.88320857720425 2.2788e-05 deg
tp 2459090.127661125072
(2020-Aug-28.62766113)
0.00012056 TDB
period 1902.678980008223
5.21
1.2702e-05
3.478e-08
d
yr
n .1892069044660619 1.2632e-09 deg/d
Q 3.157745858970858 1.4054e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2836  
   data-arc span      32900 days (90.08 yr)  
   first obs. used      1931-01-16  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:32:16  

Additional Information
 Earth MOID = 1.86396 au 
 Jupiter MOID = 1.93947 au 
 T_jup = 3.230 
[ 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 11.27   n/a MPCxxxxx  
diameter diameter 18.251 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.160   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3774 Megumi (1987 YC)          Discovered 1987-Dec-20 by Kojima, T. at Chiyoda
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 YC = 1931 BG = 1933 OA = 1974 FW1 = 1974 HO3 = 1976 YL6 = 1986 TH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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