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7818 Muirhead (1990 QO)
Classification: Mars-crossing Asteroid          SPK-ID: 2007818
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3498819967984234 3.3496e-08  
a 2.339535659460681 7.1493e-09 au
q 1.520974251347462 7.7783e-08 au
i 21.74660853919413 4.4742e-06 deg
node 160.4578041932508 1.0888e-05 deg
peri 254.674653632933 1.2419e-05 deg
M 66.95707538575873 6.9673e-06 deg
tp 2458757.398910232028
(2019-Sep-30.89891023)
2.4905e-05 TDB
period 1307.052194443429
3.58
5.9913e-06
1.64e-08
d
yr
n .2754289396631907 1.2625e-09 deg/d
Q 3.1580970675739 9.6507e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1568  
   data-arc span      18320 days (50.16 yr)  
   first obs. used      1970-03-03  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45638  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:51:00  

Additional Information
 Earth MOID = .666177 au 
 Jupiter MOID = 2.64525 au 
 T_jup = 3.391 
[ 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 13.9   n/a MPO448991  
diameter diameter 3.907 km 0.593 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.297   0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

7818 Muirhead (1990 QO)          Discovered 1990-Aug-19 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1990 QO = 1970 ET1 = 1988 DN5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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