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4228 Nemiro (1968 OC1)
Classification: Main-belt Asteroid          SPK-ID: 2004228
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1368561401058096 3.1293e-08  
a 2.303761382881441 7.0951e-09 au
q 1.988477492295465 7.2327e-08 au
i 5.27187092225938 3.3509e-06 deg
node 223.1732032938131 3.9036e-05 deg
peri 113.3943950591795 4.0971e-05 deg
M 160.6871822717117 1.2537e-05 deg
tp 2458030.423153690726
(2017-Oct-03.92315369)
4.4267e-05 TDB
period 1277.187525289427
3.50
5.9002e-06
1.615e-08
d
yr
n .2818693362342538 1.3021e-09 deg/d
Q 2.619045273467418 8.0661e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2379  
   data-arc span      18541 days (50.76 yr)  
   first obs. used      1968-07-25  
   last obs. used      2019-04-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48289  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:31:52  

Additional Information
 Earth MOID = .985556 au 
 Jupiter MOID = 2.74147 au 
 T_jup = 3.571 
[ 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 14.1   n/a MPO337287  
diameter diameter 3.469 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.772 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.420   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4228 Nemiro           Discovered 1968 July 25 by G. A. Plyugin and Yu. A. Belyaev at Cerro El Roble.
Andrej Antonovich Nemiro (1909-1995) worked at the Pulkovo Observatory for more than 50 years and was one of the distinguished successors to the scientific traditions of the Pulkovo Astrometry School. The name was suggested by the Pulkovo Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1968 OC1 = 1986 WB9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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