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1429 Pemba (1937 NH)
Classification: Main-belt Asteroid          SPK-ID: 2001429
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3334179728466878 8.999e-09  
a 2.556488281376399 7.9137e-09 au
q 1.704109140993568 2.1219e-08 au
i 7.745785200092976 8.5803e-07 deg
node 47.67899966224064 4.7779e-06 deg
peri 297.8760295916927 6.2666e-06 deg
M 136.8678086423948 3.6147e-06 deg
tp 2458632.873124976257
(2019-May-29.37312498)
1.3343e-05 TDB
period 1493.014880821663
4.09
6.9325e-06
1.898e-08
d
yr
n .2411228478860695 1.1196e-09 deg/d
Q 3.408867421759231 1.0552e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2780  
   data-arc span      30575 days (83.71 yr)  
   first obs. used      1937-07-02  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:29:00  

Additional Information
 Earth MOID = .712864 au 
 Jupiter MOID = 2.06634 au 
 T_jup = 3.345 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.41   n/a MPCxxxxx  
diameter diameter 9.874 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.]
geometric albedo albedo 0.196   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1429 Pemba (1937 NH)          Discovered 1937-Jul-02 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1937 NH = 1949 JK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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