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JPL Small-Body Database Browser
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1122 Neith (1928 SB)
Classification: Main-belt Asteroid          SPK-ID: 2001122
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2558136876033869 4.1013e-08  
a 2.608299545506325 1.0309e-08 au
q 1.941060820396114 1.0646e-07 au
i 4.733736056459819 4.4172e-06 deg
node 63.38374250800949 4.804e-05 deg
peri 328.7643633465721 4.868e-05 deg
M 265.2055844051984 1.2075e-05 deg
tp 2459405.649099674181
(2021-Jul-10.14909967)
5.3332e-05 TDB
period 1538.631521356236
4.21
9.1215e-06
2.497e-08
d
yr
n .2339741484580244 1.3871e-09 deg/d
Q 3.275538270616536 1.2946e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2364  
   data-arc span      34854 days (95.43 yr)  
   first obs. used      1924-11-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:19:11  

Additional Information
 Earth MOID = .949126 au 
 Jupiter MOID = 2.16663 au 
 T_jup = 3.359 
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Orbital Elements at Epoch 2456489.5 (2013-Jul-16.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2572188532298715 4.1062e-08  
q 1.936261597027365 1.0655e-07 au
tp 2456334.861905695717
(2013-Feb-11.36190570)
4.2003e-05 TDB
node 63.42334318434819 4.7961e-05 deg
peri 329.2506178848866 4.8588e-05 deg
i 4.739422123859624 4.4232e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2364  
   data-arc span      34854 days (95.43 yr)  
   first obs. used      1924-11-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:19:11  

Additional Information
 Jupiter MOID = 2.16663 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.686116073269067E-15 -4.364120489860157E-15 2.456782176738423E-13 4.717349406975862E-15 1.488615565172825E-14 5.151110842171539E-16
q -4.364120489860157E-15 1.135315321282477E-14 -5.007411662321179E-13 -1.197654652913538E-14 -1.433195095355481E-14 -1.370935025240285E-15
tp 2.456782176738423E-13 -5.007411662321179E-13 1.764221597277592E-9 3.499171967854308E-12 3.442529459923625E-10 -6.919321017802835E-13
node 4.717349406975862E-15 -1.197654652913538E-14 3.499171967854308E-12 2.300268913229562E-9 -2.291625645333473E-9 -5.254076267659106E-11
peri 1.488615565172825E-14 -1.433195095355481E-14 3.442529459923625E-10 -2.291625645333473E-9 2.360782607791823E-9 5.22239362151615E-11
i 5.151110842171539E-16 -1.370935025240285E-15 -6.919321017802835E-13 -5.254076267659106E-11 5.22239362151615E-11 1.956497711431472E-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 11.8   n/a MPO452174  
diameter diameter 11.566 km 0.261 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.599 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:
[Oey, J. (2009) Minor Planet Bull. 36, 162-165.]
geometric albedo albedo 0.284   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1122 Neith (1928 SB)          Discovered 1928-Sep-17 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1928 SB = 1941 YH = 1953 OA = A924 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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