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1428 Mombasa (1937 NO)
Classification: Main-belt Asteroid          SPK-ID: 2001428
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1413061472048993 1.7153e-08  
a 2.809182328590425 9.8835e-09 au
q 2.412227596941225 4.7349e-08 au
i 17.30653701412801 3.5563e-07 deg
node 115.7094551153558 1.5444e-06 deg
peri 252.4648500717079 8.3611e-06 deg
M 196.8688685419057 1.1373e-05 deg
tp 2459979.796393170547
(2023-Feb-04.29639317)
5.6673e-05 TDB
period 1719.761881339398
4.71
9.076e-06
2.485e-08
d
yr
n .2093313056337905 1.1047e-09 deg/d
Q 3.206137060239626 1.128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3017  
   data-arc span      31894 days (87.32 yr)  
   first obs. used      1933-11-18  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35682  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:25:47  

Additional Information
 Earth MOID = 1.46948 au 
 Jupiter MOID = 2.34591 au 
 T_jup = 3.241 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456763.5 (2014-Apr-16.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1378339629488184 1.695e-08  
q 2.423125153037135 4.6683e-08 au
tp 2456534.431558953705
(2013-Aug-29.93155895)
4.9537e-05 TDB
node 115.819233059866 1.5421e-06 deg
peri 251.7756865161073 8.6276e-06 deg
i 17.32699672852018 3.5673e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3017  
   data-arc span      31894 days (87.32 yr)  
   first obs. used      1933-11-18  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35682  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:25:47  

Additional Information
 Jupiter MOID = 2.34591 au 
 T_jup = 3.241 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.873038092357544E-16 -7.784256540664579E-16 4.900043797351419E-13 9.550442780096879E-15 6.146965386767477E-14 2.35378121343924E-15
q -7.784256540664579E-16 2.179340757311577E-15 -1.234609885598467E-12 -2.61752109796607E-14 -1.450524157498965E-13 -6.575851175593746E-15
tp 4.900043797351419E-13 -1.234609885598467E-12 2.453917001051399E-9 5.548242181658257E-12 4.157406195566301E-10 -4.260263522212126E-12
node 9.550442780096879E-15 -2.61752109796607E-14 5.548242181658257E-12 2.378093880160752E-12 -1.442490858929563E-12 3.677701262987226E-13
peri 6.146965386767477E-14 -1.450524157498965E-13 4.157406195566301E-10 -1.442490858929563E-12 7.443493353860213E-11 -1.303066585488603E-12
i 2.35378121343924E-15 -6.575851175593746E-15 -4.260263522212126E-12 3.677701262987226E-13 -1.303066585488603E-12 1.272569868287626E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.34   n/a E2021B10  
diameter diameter 52.464 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.67 h n/a LCDB (Rev. 2020-October); 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:
[Hawkins, S.; Ditteon, R. (2008) Minor Planet Bull. 35, 1-4.]
[Stephens, R.D. (2012) Posting on CALL web site. http://www.minorplanet.info/call.html]
geometric albedo albedo 0.038   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Xc   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)

1428 Mombasa (1937 NO)          Discovered 1937-Jul-05 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1937 NO = 1933 WO = 1949 FA = 1957 YZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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