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903 Nealley (A918 RH)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000903
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04560729952909705 9.5866e-09  
a 3.237891961292193 1.1654e-08 au
q 3.090220452770685 3.5253e-08 au
i 11.78221013591295 3.9793e-07 deg
node 159.382414128048 1.8825e-06 deg
peri 233.9356648704364 2.3467e-05 deg
M 174.5361774863693 2.5616e-05 deg
tp 2458364.748956709727
(2018-Sep-03.24895671)
0.0001497 TDB
period 2128.099634893779
5.83
1.149e-05
3.146e-08
d
yr
n .1691650118712458 9.1334e-10 deg/d
Q 3.385563469813702 1.2186e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3669  
   data-arc span      37548 days (102.80 yr)  
   first obs. used      1918-09-06  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:42:05  

Additional Information
 Earth MOID = 2.10795 au 
 Jupiter MOID = 1.84353 au 
 T_jup = 3.150 
[ 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 10.11   n/a MPCxxxxx  
diameter diameter 58.065 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 19.72 h n/a LCDB (Rev. 2020-October); 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:
[Warner, B.D (2012) Minor Planet Bull. 39, 16-21.]
geometric albedo albedo 0.054   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

903 Nealley (A918 RH)          Discovered 1918-Sep-13 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A918 RH = 1927 DB = 1930 SC1 = 1935 QO = 1936 TJ = 1941 QG = 1947 QC = 1951 GE1 = 1951 JE = 1952 KK = 1952 MO = 1960 WU = A918 WC = A924 SD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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