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4432 McGraw-Hill (1981 ER22)
Classification: Main-belt Asteroid          SPK-ID: 2004432
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2132781038270496 2.8177e-08  
a 2.386773396634577 6.6509e-09 au
q 1.877726892335508 6.8899e-08 au
i .4613769158357889 3.4902e-06 deg
node 115.2353212553971 0.00036047 deg
peri 246.3239833925432 0.00036055 deg
M 95.4055544053636 8.5326e-06 deg
tp 2458843.567274346036
(2019-Dec-26.06727435)
3.1422e-05 TDB
period 1346.83752991433
3.69
5.6296e-06
1.541e-08
d
yr
n .2672928189214471 1.1172e-09 deg/d
Q 2.895819900933647 8.0694e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      20611 days (56.43 yr)  
   first obs. used      1964-10-08  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:20:21  

Additional Information
 Earth MOID = .873306 au 
 Jupiter MOID = 2.55995 au 
 T_jup = 3.503 
[ 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 14.59   n/a MPCxxxxx  
diameter diameter 3.042 km 0.643 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.254   0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4432 McGraw-Hill (1981 ER22)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 ER22 = 1964 TV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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