Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3429392868661272 3.6988e-08  
a 2.289011197597929 4.3864e-09 au
q 1.504019329865116 8.5014e-08 au
i 7.108233666839847 4.0959e-06 deg
node 355.4449579734913 2.8161e-05 deg
peri 354.7933213387047 2.8652e-05 deg
M 305.1800642830664 8.2358e-06 deg
tp 2459193.122193381080
(2020-Dec-09.62219338)		 2.9295e-05 TDB
period 1264.941096889483
3.46		 3.6359e-06
9.955e-09		 d
yr
n .2845982321906115 8.1805e-10 deg/d
Q 3.074003065330742 5.8906e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2418  
   data-arc span      41669 days (114.08 yr)  
   first obs. used      1906-10-17  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46909  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:48  

Additional Information
 Earth MOID = .49845 au 
 Jupiter MOID = 2.36248 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. 2020-October); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-26 12:39 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin