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1384 Kniertje (1934 RX)
Classification: Main-belt Asteroid          SPK-ID: 2001384
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1825521406875746 4.2395e-08  
a 2.677112680599896 1.2762e-08 AU
q 2.188400029894534 1.126e-07 AU
i 11.85663111703376 6.1283e-06 deg
node 152.860567890895 2.3429e-05 deg
peri 276.5096973161076 2.8867e-05 deg
M 62.60044482962464 1.6503e-05 deg
tp 2456722.289624687499
(2014-Mar-05.78962469)
7.3208e-05 JED
period 1599.920501924345
4.38
1.1441e-05
3.132e-08
d
yr
n .2250111799723804 1.609e-09 deg/d
Q 3.165825331305258 1.5092e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1542  
   data-arc span      29502 days (80.77 yr)  
   first obs. used      1934-09-09  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54595  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:38:47  

Additional Information
 Earth MOID = 1.23963 AU 
 T_jup = 3.324 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.6 mag n/a MPO319099  
diameter diameter 27.51 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 9.807 h n/a LCDB (Rev. 2015-July); 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 Bul. 35, 1-4.]
[Vinson, R.; Moore, R.; Ditteon, R. (2014) Minor Planet Bul. 41, 169-170.]
geometric albedo albedo 0.3077   0.039 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8

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 | Physical Parameters | Discovery Circumstances ]
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