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1634 Ndola (1935 QP)
Classification: Main-belt Asteroid          SPK-ID: 2001634
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1618318282938738 3.1682e-08  
a 2.245639398480451 5.7832e-09 au
q 1.882223468935605 7.0735e-08 au
i 7.5983652563197 3.6683e-06 deg
node 90.72072961133816 2.9018e-05 deg
peri 190.9171616434719 3.1481e-05 deg
M 95.55146029562364 1.359e-05 deg
tp 2458674.255436401750
(2019-Jul-09.75543640)
4.5965e-05 TDB
period 1229.160104220292
3.37
4.7482e-06
1.3e-08
d
yr
n .2928829196163693 1.1314e-09 deg/d
Q 2.609055328025297 6.7191e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2339  
   data-arc span      33683 days (92.22 yr)  
   first obs. used      1928-05-14  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45356  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:09  

Additional Information
 Earth MOID = .866364 au 
 Jupiter MOID = 2.52151 au 
 T_jup = 3.602 
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Orbital Elements at Epoch 2456232.5 (2012-Nov-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .16246489783633 3.1743e-08  
q 1.880761888378769 7.0968e-08 au
tp 2456214.344374019522
(2012-Oct-13.84437402)
4.3444e-05 TDB
node 90.76832592737071 2.8986e-05 deg
peri 190.6165092508103 3.1428e-05 deg
i 7.602919212127532 3.6707e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2339  
   data-arc span      33683 days (92.22 yr)  
   first obs. used      1928-05-14  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45356  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:09  

Additional Information
 Jupiter MOID = 2.52151 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.007592243207895E-15 -2.247483218165027E-15 8.711694639841692E-15 -2.55929211713851E-15 2.33620188069361E-15 6.429951558393304E-17
q -2.247483218165027E-15 5.036510368563739E-15 1.071194863678748E-14 5.748994823243836E-15 2.003892519775142E-15 -9.4764730878326E-17
tp 8.711694639841692E-15 1.071194863678748E-14 1.887347078109364E-9 2.290985409390609E-12 5.415477874177745E-10 -1.485647797143292E-12
node -2.55929211713851E-15 5.748994823243836E-15 2.290985409390609E-12 8.402028008872452E-10 -8.317334659742808E-10 -3.835236890651436E-12
peri 2.33620188069361E-15 2.003892519775142E-15 5.415477874177745E-10 -8.317334659742808E-10 9.877505369810393E-10 3.37148809284781E-12
i 6.429951558393304E-17 -9.4764730878326E-17 -1.485647797143292E-12 -3.835236890651436E-12 3.37148809284781E-12 1.347424870522512E-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 12.8   n/a MPO435711  
diameter diameter 9.035 km 1.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 64.23 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:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.179   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1634 Ndola           Discovered 1935 Aug. 19 by C. Jackson at Johannesburg.
Named for the most important mining town in Zambia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5182Last Updated: 2006-03-21

Alternate Designations
 1935 QP = 1928 KB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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