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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
15718 Imokawa (1990 BB2)
Classification: Main-belt Asteroid          SPK-ID: 2015718
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104387874639784 6.9631e-08  
a 2.592330586890029 1.3064e-08 au
q 2.306036740168111 1.8418e-07 au
i 11.14404342176251 5.4347e-06 deg
node 305.142347882089 1.9333e-05 deg
peri 189.4441463028519 3.0366e-05 deg
M 97.85968887109532 1.936e-05 deg
tp 2458586.085127510486
(2019-Apr-12.58512751)
8.226e-05 TDB
period 1524.52307806479
4.17
1.1525e-05
3.155e-08
d
yr
n .2361394229971116 1.7851e-09 deg/d
Q 2.878624433611947 1.4507e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1610  
   data-arc span      23947 days (65.56 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:26:10  

Additional Information
 Earth MOID = 1.32116 au 
 Jupiter MOID = 2.17992 au 
 T_jup = 3.384 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO337391  
diameter diameter 5.486 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.281   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15718 Imokawa           Discovered 1990 Jan. 30 by M. Matsuyama and K. Watanabe at Kushiro.
Satoshi Imokawa (b. 1965) is an astronomy instructor at the public astronomical observatory Hoshino Bunkakan in Yame city, Fukuoka prefecture. His main interests are observing comets, nebulae, star clusters and solar eclipse.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-01-31Last Updated: 2018-02-05

Alternate Designations
 1990 BB2 = 1973 AK = 1994 AV2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-05 23:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin