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JPL Small-Body Database Browser
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1640 Nemo (1951 QA)
Classification: Mars-crossing Asteroid          SPK-ID: 2001640
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3429447967526718 5.0334e-08  
a 2.288229982219622 5.1406e-09 au
q 1.503493416043944 1.1426e-07 au
i 7.109049750812663 4.4376e-06 deg
node 355.4554467269467 2.8627e-05 deg
peri 354.850037157832 2.9262e-05 deg
M 191.2116442359494 1.0735e-05 deg
tp 2459193.272320861711
(2020-Dec-09.77232086)
3.9182e-05 TDB
period 1264.293585563007
3.46
4.2604e-06
1.166e-08
d
yr
n .2847439899330717 9.5953e-10 deg/d
Q 3.0729665483953 6.9035e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      41114 days (112.56 yr)  
   first obs. used      1906-10-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47238  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:25:37  

Additional Information
 Earth MOID = .497032 au 
 Jupiter MOID = 2.36004 au 
 T_jup = 3.510 
[ show covariance matrix ]

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 13.3   n/a MPO337259  
rotation period rot_per 5.0 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1640 Nemo (1951 QA)          Discovered 1951-Aug-31 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1951 QA = A906 UA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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