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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2443173712601704 9.3533e-09  
a 2.54201664200972 7.0719e-09 au
q 1.9209578183343 2.2734e-08 au
i 7.634173064532938 2.6412e-07 deg
node 359.6089156598391 4.6746e-06 deg
peri 343.1892920692562 4.878e-06 deg
M 183.640167509361 3.6447e-06 deg
tp 2460121.709004667713
(2023-Jun-26.20900467)
1.7053e-05 TDB
period 1480.355464128909
4.05
6.1776e-06
1.691e-08
d
yr
n .2431848354826292 1.0148e-09 deg/d
Q 3.163075465685141 8.7997e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3670  
   data-arc span      35577 days (97.40 yr)  
   first obs. used      1924-02-01  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:51:14  

Additional Information
 Earth MOID = .914099 au 
 Jupiter MOID = 2.25577 au 
 T_jup = 3.390 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457127.5 (2015-Apr-15.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2462235828451802 9.3905e-09  
q 1.915004695694514 2.2856e-08 au
tp 2457161.056774411193
(2015-May-18.55677441)
1.1446e-05 TDB
node 359.6947703470336 4.6665e-06 deg
peri 343.015504510851 4.854e-06 deg
i 7.646872153019909 2.647e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3670  
   data-arc span      35577 days (97.40 yr)  
   first obs. used      1924-02-01  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:51:14  

Additional Information
 Jupiter MOID = 2.25577 au 
 T_jup = 3.390 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.818104599992982E-17 -2.09346317551045E-16 3.226200393884449E-14 2.378179670229948E-15 7.516323905321874E-16 9.50531742682569E-16
q -2.09346317551045E-16 5.224027612510614E-16 -8.123344963892099E-14 -6.041597556195706E-15 -2.068510883294677E-15 -2.414134083900271E-15
tp 3.226200393884449E-14 -8.123344963892099E-14 1.310034900812749E-10 1.547039702015874E-11 2.059392263995857E-11 8.62361847179099E-13
node 2.378179670229948E-15 -6.041597556195706E-15 1.547039702015874E-11 2.177604415187763E-11 -1.72867538537033E-11 2.127761884816212E-14
peri 7.516323905321874E-16 -2.068510883294677E-15 2.059392263995857E-11 -1.72867538537033E-11 2.35616534825731E-11 1.758813508022018E-13
i 9.50531742682569E-16 -2.414134083900271E-15 8.62361847179099E-13 2.127761884816212E-14 1.758813508022018E-13 7.00684171670383E-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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