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156548 (2002 EM1)
Classification: Main-belt Asteroid          SPK-ID: 2156548
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09224471387569229 4.6761e-08  
a 2.653085231098312 1.9308e-08 au
q 2.408352143067823 1.2678e-07 au
i 12.88786919963079 5.3958e-06 deg
node 35.37712102186022 1.9943e-05 deg
peri 241.7792078876467 3.3703e-05 deg
M 328.8639810688577 2.7379e-05 deg
tp 2459137.016709497155
(2020-Oct-14.51670950)
0.00011997 TDB
period 1578.429648557929
4.32
1.723e-05
4.717e-08
d
yr
n .2280747832688647 2.4897e-09 deg/d
Q 2.8978183191288 2.1089e-08 au
  Orbit Determination Parameters
   # obs. used (total)      544  
   data-arc span      8077 days (22.11 yr)  
   first obs. used      1998-04-19  
   last obs. used      2020-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 03:02:06  

Additional Information
 Earth MOID = 1.42245 au 
 Jupiter MOID = 2.20998 au 
 T_jup = 3.347 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO345253  
diameter diameter 3.294 km 0.275 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.123   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

156548 (2002 EM1)          Discovered 2002-Mar-06 by Kusnirak, P. at Ondrejov
Reference: 20070502/Numbers.arcLast Updated: 2007-05-02

Alternate Designations
 2002 EM1 = 1998 HY131 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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