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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04560729956535199 9.5858e-09  
a 3.237891961091301 1.1639e-08 au
q 3.090220452461565 3.524e-08 au
i 11.7822101369631 3.9793e-07 deg
node 159.3824141296391 1.8825e-06 deg
peri 233.9356648528178 2.3467e-05 deg
M 174.5361775428075 2.5616e-05 deg
tp 2458364.748956472120
(2018-Sep-03.24895647)
0.0001497 TDB
period 2128.099634695724
5.83
1.1475e-05
3.142e-08
d
yr
n .1691650118869894 9.1212e-10 deg/d
Q 3.385563469721037 1.217e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3720  
   data-arc span      37586 days (102.90 yr)  
   first obs. used      1918-09-06  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:07:37  

Additional Information
 Earth MOID = 2.10795 au 
 Jupiter MOID = 1.84353 au 
 T_jup = 3.150 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456833.5 (2014-Jun-25.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04336285908700115 9.6906e-09  
q 3.10220190683798 3.5346e-08 au
tp 2456253.183021178392
(2012-Nov-21.68302118)
0.00015375 TDB
node 159.407825382588 1.8835e-06 deg
peri 237.1930812730635 2.4586e-05 deg
i 11.77130792340422 3.974e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3720  
   data-arc span      37586 days (102.90 yr)  
   first obs. used      1918-09-06  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:07:37  

Additional Information
 Jupiter MOID = 1.84353 au 
 T_jup = 3.150 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.390789163031303E-17 -3.260936023975741E-16 2.085451939864197E-13 5.530524369426069E-15 2.329023668390456E-14 7.382888552724809E-16
q -3.260936023975741E-16 1.24935911086358E-15 -3.073761612292019E-13 -1.8314028016806E-14 -7.724617470614913E-15 -2.368763278655535E-15
tp 2.085451939864197E-13 -3.073761612292019E-13 2.363830086444456E-8 -2.132760996089813E-11 3.767352342724295E-9 -9.192594068385244E-13
node 5.530524369426069E-15 -1.8314028016806E-14 -2.132760996089813E-11 3.547444436978099E-12 -6.665272550022391E-12 4.332503061147112E-13
peri 2.329023668390456E-14 -7.724617470614913E-15 3.767352342724295E-9 -6.665272550022391E-12 6.044668610374098E-10 -5.511041925500581E-13
i 7.382888552724809E-16 -2.368763278655535E-15 -9.192594068385244E-13 4.332503061147112E-13 -5.511041925500581E-13 1.579258517895784E-13

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 10.10   n/a MPO636074  
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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