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3908 Nyx (1980 PA)
Classification: Amor [NEO]          SPK-ID: 2003908
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 232 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4589289271451735 2.3541e-09  
a 1.927755560226535 1.8461e-09 au
q 1.043052769173628 4.567e-09 au
i 2.185375096668551 6.9794e-07 deg
node 261.2457714925189 2.509e-05 deg
peri 126.5701489938636 2.4922e-05 deg
M 10.19646744998641 2.1359e-06 deg
tp 2459172.809958289604
5.7623e-06 TDB
period 977.6341722893231
n .3682359007122153 5.2895e-10 deg/d
Q 2.812458351279442 2.6933e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 1.245465003750319E-14 2.242E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      1933  
   # delay obs. used      15  
   # Doppler obs. used      1  
   data-arc span      14804 days (40.53 yr)  
   first obs. used      1980-08-06  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:42:52  

Additional Information
 Earth MOID = .0564903 au 
 Jupiter MOID = 2.64789 au 
 T_jup = 3.780 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.35   n/a MPCxxxxx  
diameter diameter 1.0 km 0.15 Benner et al. (2002) Icaurs 158:379-388  
rotation period rot_per 4.42601 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Drummond, J.D.; Wisniewski, W.Z. (1990) Icarus 83, 349-359.]
[Kaasalainen, M.; et al. (2004) Icarus 167, 178-196.]
[Cooney, Jr.; W.R.; Gross, J.; Terrell, D.; Reddy, V.; Dyvig, R. (2007) Minor Planet Bull. 34, 47-48.]
geometric albedo albedo 0.23   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
Tholen spectral type spec_T V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B V   n/a Binzel et al. (2004) Icarus 170, 259-294  

3908 Nyx           Discovered 1980 Aug. 6 by H.-E. Schuster at the European Southern Observatory.
Named for the goddess and personification of the night. She was a daughter of Chaos and had many children by her brother Erebus, who personifies the subterranean darkness. The realm of Nyx was in the far West, beyond the land of Atlas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1980 PA = 1988 XB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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