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4001 Ptolemaeus (1949 PV)
Classification: Main-belt Asteroid          SPK-ID: 2004001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1723514827472792 3.9563e-08  
a 2.286959567627436 6.9021e-09 au
q 1.892798695163771 9.0059e-08 au
i 5.457997671169395 3.5359e-06 deg
node 130.658829087216 3.9525e-05 deg
peri 204.2378847691857 4.0924e-05 deg
M 219.2831916676659 1.2563e-05 deg
tp 2459694.275607558608
(2022-Apr-24.77560756)
4.5048e-05 TDB
period 1263.240836881979
3.46
5.7187e-06
1.566e-08
d
yr
n .2849812874072197 1.2901e-09 deg/d
Q 2.681120440091101 8.0917e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2292  
   data-arc span      26158 days (71.62 yr)  
   first obs. used      1949-08-02  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47157  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:49:16  

Additional Information
 Earth MOID = .882214 au 
 Jupiter MOID = 2.67963 au 
 T_jup = 3.575 
[ 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 13.65   n/a E2021B10  
diameter diameter 4.641 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.392   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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)

4001 Ptolemaeus (1949 PV)          Discovered 1949-Aug-02 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 PV = 1949 QD1 = 1982 BU9 = 1987 OE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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