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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .182328202885836 3.0172e-08  
a 2.67551563278605 8.6944e-09 au
q 2.187693675667209 8.0458e-08 au
i 11.85805488300971 4.5433e-06 deg
node 152.8510986398637 1.6638e-05 deg
peri 276.0129936460096 2.109e-05 deg
M 153.4926284971025 1.3064e-05 deg
tp 2458318.954760497101
(2018-Jul-19.45476050)
5.7116e-05 TDB
period 1598.489052037279
4.38
7.7918e-06
2.133e-08
d
yr
n .2252126778980306 1.0978e-09 deg/d
Q 3.163337589904891 1.028e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2733  
   data-arc span      31193 days (85.40 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47481  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:53:28  

Additional Information
 Earth MOID = 1.2393 au 
 Jupiter MOID = 2.23287 au 
 T_jup = 3.325 
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Orbital Elements at Epoch 2456367.5 (2013-Mar-16.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1818881164906358 3.0297e-08  
q 2.189432276985403 8.0757e-08 au
tp 2456722.359423521395
(2014-Mar-05.85942352)
5.5918e-05 TDB
node 152.8779218432124 1.665e-05 deg
peri 276.5277908268293 2.1083e-05 deg
i 11.85193483962357 4.5413e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2733  
   data-arc span      31193 days (85.40 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47481  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:53:28  

Additional Information
 Jupiter MOID = 2.23287 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.179058804996506E-16 -2.437051843716012E-15 1.071306701433903E-13 -8.572053078630499E-16 1.972141828193853E-15 3.034022604511068E-16
q -2.437051843716012E-15 6.521636934306701E-15 -2.617164768333947E-13 2.181076422166053E-15 -4.569624582490786E-15 -6.644961121660747E-16
tp 1.071306701433903E-13 -2.617164768333947E-13 3.126849057877112E-9 -1.313404994076968E-11 7.320480654990697E-10 -1.486740307426741E-12
node -8.572053078630499E-16 2.181076422166053E-15 -1.313404994076968E-11 2.772246905646039E-10 -2.737043198349007E-10 2.128112251181542E-12
peri 1.972141828193853E-15 -4.569624582490786E-15 7.320480654990697E-10 -2.737043198349007E-10 4.444900663134624E-10 -2.444219455649402E-12
i 3.034022604511068E-16 -6.644961121660747E-16 -1.486740307426741E-12 2.128112251181542E-12 -2.444219455649402E-12 2.062346008324168E-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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