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1018 Arnolda (A924 ET)
Classification: Main-belt Asteroid          SPK-ID: 2001018
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2442061183958224 9.3571e-09  
a 2.542171479235753 7.0822e-09 au
q 1.921357649995024 2.2739e-08 au
i 7.633368918567937 2.6415e-07 deg
node 359.6125064170421 4.6807e-06 deg
peri 343.1663957810882 4.8865e-06 deg
M 136.0128117875641 3.5262e-06 deg
tp 2458641.150817072728
(2019-Jun-06.65081707)
1.3257e-05 TDB
period 1480.490721479438
4.05
6.1867e-06
1.694e-08
d
yr
n .2431626181623456 1.0161e-09 deg/d
Q 3.162985308476483 8.8117e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3523  
   data-arc span      35480 days (97.14 yr)  
   first obs. used      1924-02-01  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3778  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:05:55  

Additional Information
 Earth MOID = .913503 au 
 Jupiter MOID = 2.25571 au 
 T_jup = 3.390 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457036.5 (2015-Jan-14.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2462437577526126 9.3918e-09  
q 1.914971592340109 2.2859e-08 au
tp 2457161.075562923578
(2015-May-18.57556292)
1.1496e-05 TDB
node 359.6961526778044 4.672e-06 deg
peri 343.0225065957335 4.8611e-06 deg
i 7.646718458985319 2.6477e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3523  
   data-arc span      35480 days (97.14 yr)  
   first obs. used      1924-02-01  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3778  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:05:55  

Additional Information
 Jupiter MOID = 2.25571 au 
 T_jup = 3.390 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.820680500180662E-17 -2.093591988255667E-16 3.203146151325144E-14 2.361510183581514E-15 6.957490151034225E-16 9.493305942162752E-16
q -2.093591988255667E-16 5.225146549366459E-16 -8.118510114635909E-14 -6.061368205826913E-15 -2.031445012687299E-15 -2.414379484678225E-15
tp 3.203146151325144E-14 -8.118510114635909E-14 1.321567353632539E-10 1.563520634697292E-11 2.08024636424253E-11 8.688056262700981E-13
node 2.361510183581514E-15 -6.061368205826913E-15 1.563520634697292E-11 2.182756503456517E-11 -1.728628428802144E-11 2.243547280259999E-14
peri 6.957490151034225E-16 -2.031445012687299E-15 2.08024636424253E-11 -1.728628428802144E-11 2.36298853879948E-11 1.767978896945758E-13
i 9.493305942162752E-16 -2.414379484678225E-15 8.688056262700981E-13 2.243547280259999E-14 1.767978896945758E-13 7.010553386024968E-14

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.14   n/a MPCxxxxx IRAS observations used: 3
diameter diameter 16.557 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.617 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pligge, Z.; Monnier, A.; Pharo, J.; Stolze, K.; Yim, A.; Ditteon, R. (2011) Minor Planet Bull. 38, 5-7.]
[Aznar, A.; Garceran, A.C.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 174-181.]
geometric albedo albedo 0.371   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1018 Arnolda (A924 ET)          Discovered 1924-Mar-03 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A924 ET = 1926 VK = 1952 BV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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