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 ]  
3900 Knezevic (1985 RK)
Classification: Main-belt Asteroid          SPK-ID: 2003900
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1387288999135949 1.0706e-08  
a 2.370134897208183 7.6353e-09 au
q 2.041328690271671 2.4488e-08 au
i 6.716359818322308 9.6178e-07 deg
node 338.1740260624521 3.245e-06 deg
peri 55.58685738379388 9.9049e-06 deg
M 205.945306568544 9.0115e-06 deg
tp 2459770.835569130757
(2022-Jul-10.33556913)
3.4469e-05 TDB
period 1332.778640583427
3.65
6.4403e-06
1.763e-08
d
yr
n .2701123720308192 1.3052e-09 deg/d
Q 2.698941104144696 8.6946e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      16792 days (45.97 yr)  
   first obs. used      1974-08-24  
   last obs. used      2020-08-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44214  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:42:03  

Additional Information
 Earth MOID = 1.05422 au 
 Jupiter MOID = 2.7563 au 
 T_jup = 3.523 
[ 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 13.39   n/a E2021B10  
diameter diameter 4.959 km 0.350 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.260 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Hasegawa, S.; Miyaska, S.; Mito, H.; Sarugaku, Y.; et al. (2014) Pub. Astron. Soc. Japan 66, 54.]
[Stephens, R. D.; Warner, B. D. (2019) MPB 46, 180-187.]
geometric albedo albedo 0.413   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B V   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)

3900 Knezevic (1985 RK)          Discovered 1985-Sep-14 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1985 RK = 1974 QS1 = 1974 RE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-22 15:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin