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1384 Kniertje (1934 RX)
Classification: Main-belt Asteroid          SPK-ID: 2001384
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1823282016362658 3.007e-08  
a 2.675515632769981 8.3365e-09 au
q 2.187693678997315 8e-08 au
i 11.8580567661266 3.2908e-06 deg
node 152.8510972897595 1.6448e-05 deg
peri 276.0129953959482 1.9272e-05 deg
M 153.4926281418937 1.1642e-05 deg
tp 2458318.954762080456
(2018-Jul-19.45476208)
5.0192e-05 TDB
period 1598.489052022878
4.38
7.471e-06
2.045e-08
d
yr
n .2252126779000595 1.0526e-09 deg/d
Q 3.163337586542648 9.8565e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3185  
   data-arc span      31431 days (86.05 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4497  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:19:31  

Additional Information
 Earth MOID = 1.2393 au 
 Jupiter MOID = 2.23287 au 
 T_jup = 3.325 
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Orbital Elements at Epoch 2457068.5 (2015-Feb-15.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1826091179041279 3.0074e-08  
q 2.187885994024589 8.0129e-08 au
tp 2456722.147574100662
(2014-Mar-05.64757410)
4.7363e-05 TDB
node 152.8611178986125 1.6446e-05 deg
peri 276.4508195843456 1.9257e-05 deg
i 11.8576177661187 3.2906e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3185  
   data-arc span      31431 days (86.05 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4497  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:19:31  

Additional Information
 Jupiter MOID = 2.23287 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.044484502841414E-16 -2.401148668718457E-15 2.425731417189762E-14 -1.987594390337535E-15 -1.941569941676504E-14 1.699774787996071E-15
q -2.401148668718457E-15 6.420645561967008E-15 2.824208025040086E-14 4.918714985135542E-15 7.167286853928527E-14 -4.539335058148106E-15
tp 2.425731417189762E-14 2.824208025040086E-14 2.243237558220816E-9 -1.138050144523388E-11 4.884728138634436E-10 -2.087481364544407E-12
node -1.987594390337535E-15 4.918714985135542E-15 -1.138050144523388E-11 2.704765172756924E-10 -2.66636617590171E-10 8.794009811023837E-12
peri -1.941569941676504E-14 7.167286853928527E-14 4.884728138634436E-10 -2.66636617590171E-10 3.708276605279363E-10 -9.096902075494669E-12
i 1.699774787996071E-15 -4.539335058148106E-15 -2.087481364544407E-12 8.794009811023837E-12 -9.096902075494669E-12 1.082812147729392E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7   n/a MPO473782  
diameter diameter 26.517 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.807 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hawkins, S.; Ditteon, R. (2008) Minor Planet Bull. 35, 1-4.]
[Vinson, R.; Moore, R.; Ditteon, R. (2014) Minor Planet Bull. 41, 169-170.]
geometric albedo albedo 0.064   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1384 Kniertje (1934 RX)          Discovered 1934-Sep-09 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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