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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2552538944869021 3.9163e-08  
a 2.608118575809962 1.0534e-08 au
q 1.942386152050837 1.0183e-07 au
i 4.730849626209094 4.3216e-06 deg
node 63.34600287890728 4.6847e-05 deg
peri 328.775604017782 4.7522e-05 deg
M 311.9644908564667 1.2068e-05 deg
tp 2459405.781268589229
(2021-Jul-10.28126859)
5.247e-05 TDB
period 1538.471393553894
4.21
9.3208e-06
2.552e-08
d
yr
n .2339985010500547 1.4177e-09 deg/d
Q 3.273850999569087 1.3223e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2475  
   data-arc span      35032 days (95.91 yr)  
   first obs. used      1924-11-24  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42303  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:22:15  

Additional Information
 Earth MOID = .949314 au 
 Jupiter MOID = 2.16948 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456561.5 (2013-Sep-26.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573049617135173 3.9187e-08  
q 1.935946317108106 1.0222e-07 au
tp 2456334.807858976623
(2013-Feb-11.30785898)
4.1643e-05 TDB
node 63.4178206308919 4.6729e-05 deg
peri 329.2251166790192 4.7391e-05 deg
i 4.738876849584382 4.3295e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2475  
   data-arc span      35032 days (95.91 yr)  
   first obs. used      1924-11-24  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42303  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:22:15  

Additional Information
 Jupiter MOID = 2.16948 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.535602290162487E-15 -3.995142680209065E-15 1.786593580121253E-13 3.003827720797102E-15 1.233022679027583E-14 6.094145974825742E-16
q -3.995142680209065E-15 1.044989475409553E-14 -3.320051106287268E-13 -8.064158821052992E-15 -7.135641078975269E-15 -1.596894698446475E-15
tp 1.786593580121253E-13 -3.320051106287268E-13 1.734166506035189E-9 3.88326833316293E-13 3.456335439141697E-10 -4.310713220302245E-13
node 3.003827720797102E-15 -8.064158821052992E-15 3.88326833316293E-13 2.183576772400413E-9 -2.175898469654841E-9 -4.294614474833153E-11
peri 1.233022679027583E-14 -7.135641078975269E-15 3.456335439141697E-10 -2.175898469654841E-9 2.245951532436029E-9 4.271184837262268E-11
i 6.094145974825742E-16 -1.596894698446475E-15 -4.310713220302245E-13 -4.294614474833153E-11 4.271184837262268E-11 1.874464094869981E-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 11.81   n/a E2021B10  
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. 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:
[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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