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4154 Rumsey (1985 NE)
Classification: Main-belt Asteroid          SPK-ID: 2004154
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1994181166379388 5.4917e-08  
a 2.538371382487104 1.1243e-08 au
q 2.032174142063885 1.4088e-07 au
i 6.740783379150425 6.2503e-06 deg
node 358.7102876070767 3.3324e-05 deg
peri 244.1406100476656 3.5742e-05 deg
M 253.9475534149134 1.3218e-05 deg
tp 2459435.660395111485
(2021-Aug-09.16039511)
5.5263e-05 TDB
period 1477.172354665548
4.04
9.8139e-06
2.687e-08
d
yr
n .2437088663776875 1.6191e-09 deg/d
Q 3.044568622910324 1.3485e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1980  
   data-arc span      23422 days (64.13 yr)  
   first obs. used      1956-03-09  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43653  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:04:07  

Additional Information
 Earth MOID = 1.0307 au 
 Jupiter MOID = 2.01965 au 
 T_jup = 3.409 
[ 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 13.2   n/a MPO502193  
diameter diameter 6.213 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.2569 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ditteon, R.; Kirkpatrick, E.; Doering, K. (2010) Minor Planet Bull. 37, 1-4.]
geometric albedo albedo 0.289   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4154 Rumsey           Discovered 1985 July 10 by A. C. Gilmore and P. M. Kilmartin at Lake Tekapo.
Norman J. Rumsey (b. 1924) is New Zealand's foremost optical designer. With Garry Nankivell he has developed numerous optical systems for professional and amateur astronomers throughout the country. Rumsey's three-mirror designs were of particular interest.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1985 NE = 1956 EV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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