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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .141066394503175 3.9452e-08  
a 2.809770698475319 1.0964e-08 au
q 2.413406476660738 1.0955e-07 au
i 17.30657113792622 4.4496e-06 deg
node 115.7101507008533 1.4449e-05 deg
peri 252.4705566231712 2.1325e-05 deg
M 155.0030132411922 1.6895e-05 deg
tp 2458259.799929898518
(2018-May-21.29992990)
7.9673e-05 TDB
period 1720.302203555296
4.71
1.0069e-05
2.757e-08
d
yr
n .2092655576770169 1.2248e-09 deg/d
Q 3.206134920289899 1.251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2379  
   data-arc span      31461 days (86.14 yr)  
   first obs. used      1933-11-18  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:02:14  

Additional Information
 Earth MOID = 1.47222 au 
 Jupiter MOID = 2.34546 au 
 T_jup = 3.241 
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Orbital Elements at Epoch 2456091.5 (2012-Jun-13.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380343754872432 3.9067e-08  
q 2.423308105099701 1.0805e-07 au
tp 2456533.661958221970
(2013-Aug-29.16195822)
8.078e-05 TDB
node 115.8208533960914 1.4412e-05 deg
peri 251.5657149966715 2.1745e-05 deg
i 17.32419316101916 4.4542e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2379  
   data-arc span      31461 days (86.14 yr)  
   first obs. used      1933-11-18  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:02:14  

Additional Information
 Jupiter MOID = 2.34546 au 
 T_jup = 3.241 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.526261853754101E-15 -4.205853544758738E-15 4.024046575691413E-13 -2.134043573563469E-15 4.819628925616487E-14 1.616586181077331E-16
q -4.205853544758738E-15 1.167531341794801E-14 -1.025662613731624E-12 5.368473142688262E-15 -1.230717952539651E-13 -4.601914899910586E-16
tp 4.024046575691413E-13 -1.025662613731624E-12 6.525429798490129E-9 -4.640331674789788E-12 1.335059486468161E-9 -3.608289365038192E-12
node -2.134043573563469E-15 5.368473142688262E-15 -4.640331674789788E-12 2.076936924563706E-10 -1.987878738663088E-10 -4.717711168014311E-12
peri 4.819628925616487E-14 -1.230717952539651E-13 1.335059486468161E-9 -1.987878738663088E-10 4.72864326494695E-10 3.71031029447616E-12
i 1.616586181077331E-16 -4.601914899910586E-16 -3.608289365038192E-12 -4.717711168014311E-12 3.71031029447616E-12 1.983973640036839E-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 10.3   n/a MPO337256  
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. 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:
[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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