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 ]  
15644 (4157 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2015644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .158688475661382 3.8795e-08  
a 2.273478679267941 6.2214e-09 au
q 1.912703813206259 8.7866e-08 au
i 2.181470065490354 4.2928e-06 deg
node 304.6443119498954 0.00010837 deg
peri 186.680752270125 0.00010929 deg
M 91.27193662683591 1.2562e-05 deg
tp 2458883.054247645328
(2020-Feb-03.55424765)
4.3697e-05 TDB
period 1252.087717990649
3.43
5.1395e-06
1.407e-08
d
yr
n .2875197918063825 1.1802e-09 deg/d
Q 2.634253545329623 7.2086e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      21793 days (59.67 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52324  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:04:57  

Additional Information
 Earth MOID = .92724 au 
 Jupiter MOID = 2.40869 au 
 T_jup = 3.593 
[ 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 15.41   n/a E2021B10  
diameter diameter 5.395 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15644 (4157 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 4157 P-L = 1994 PO4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-21 12:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin