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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .333321106204126 3.3618e-08  
a 2.556398946398154 9.2844e-09 au
q 1.704297221685659 8.259e-08 au
i 7.746061521119111 4.6574e-06 deg
node 47.68945203369201 2.2765e-05 deg
peri 297.8532665516748 2.4431e-05 deg
M 88.67163561533464 1.0456e-05 deg
tp 2458632.774632760383
(2019-May-29.27463276)
4.2645e-05 TDB
period 1492.936622716009
4.09
8.1331e-06
2.227e-08
d
yr
n .2411354872821552 1.3136e-09 deg/d
Q 3.408500671110648 1.2379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2457  
   data-arc span      30252 days (82.83 yr)  
   first obs. used      1937-07-02  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:24:19  

Additional Information
 Earth MOID = .71476 au 
 Jupiter MOID = 2.06597 au 
 T_jup = 3.345 
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Orbital Elements at Epoch 2456715.5 (2014-Feb-27.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .335978322828404 3.3879e-08  
q 1.695571652947342 8.3496e-08 au
tp 2457140.573682586782
(2015-Apr-28.07368259)
4.0101e-05 TDB
node 47.73192916491766 2.2796e-05 deg
peri 297.817969835695 2.4422e-05 deg
i 7.74905888043202 4.6559e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2457  
   data-arc span      30252 days (82.83 yr)  
   first obs. used      1937-07-02  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:24:19  

Additional Information
 Jupiter MOID = 2.06597 au 
 T_jup = 3.345 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.147771498181879E-15 -2.823487726519657E-15 6.321088327235182E-13 -6.548675010913371E-16 1.267026552719136E-13 -6.623766906161755E-16
q -2.823487726519657E-15 6.971596445874159E-15 -1.584741787299629E-12 1.471112583837828E-15 -3.206948474265499E-13 1.536462317314324E-15
tp 6.321088327235182E-13 -1.584741787299629E-12 1.608069733534347E-9 -3.34189836883235E-12 3.578805885600136E-10 -2.087357242190617E-12
node -6.548675010913371E-16 1.471112583837828E-15 -3.34189836883235E-12 5.196491776921371E-10 -5.152333908226561E-10 1.482892033347242E-11
peri 1.267026552719136E-13 -3.206948474265499E-13 3.578805885600136E-10 -5.152333908226561E-10 5.964268152667598E-10 -1.520605272186455E-11
i -6.623766906161755E-16 1.536462317314324E-15 -2.087357242190617E-12 1.482892033347242E-11 -1.520605272186455E-11 2.167756470685724E-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 12.3   n/a MPO435709  
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. 2019-August); 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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