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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04494521192757633 3.6333e-08  
a 3.239985141524331 1.4726e-08 au
q 3.094363322696322 1.1994e-07 au
i 11.77784039970746 4.0872e-06 deg
node 159.3916747700894 1.8793e-05 deg
peri 234.4975845525061 4.7562e-05 deg
M 39.43294483609394 4.3069e-05 deg
tp 2458367.170492077315
(2018-Sep-05.67049208)
0.00025495 TDB
period 2130.163577721957
5.83
1.4522e-05
3.976e-08
d
yr
n .1690011057202432 1.1522e-09 deg/d
Q 3.385606960352341 1.5388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2711  
   data-arc span      36978 days (101.24 yr)  
   first obs. used      1918-09-06  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44426  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:50:15  

Additional Information
 Earth MOID = 2.11242 au 
 Jupiter MOID = 1.8419 au 
 T_jup = 3.149 
[ 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 10.0   n/a MPO431502  
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 21.60 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:
[Warner, B.D. (2004) Minor Planet Bull. 31, 85-88.]
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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