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JPL Small-Body Database Browser
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19694 Dunkelman (1999 RX230)
Classification: Outer Main-belt Asteroid          SPK-ID: 2019694
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08233435374009411 4.1625e-08  
a 3.548446712581193 2.7569e-08 au
q 3.256287645719659 1.4499e-07 au
i 12.28449346685982 4.4508e-06 deg
node 121.1030901505833 2.3534e-05 deg
peri 195.5123939508177 3.7695e-05 deg
M 74.1283955260274 2.9428e-05 deg
tp 2458497.766347006707
(2019-Jan-14.26634701)
0.00019965 TDB
period 2441.495108497793
6.68
2.8454e-05
7.79e-08
d
yr
n .1474506333217687 1.7184e-09 deg/d
Q 3.840605779442726 2.9839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1531  
   data-arc span      13876 days (37.99 yr)  
   first obs. used      1982-01-30  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50888  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:54:00  

Additional Information
 Earth MOID = 2.24414 au 
 Jupiter MOID = 1.43633 au 
 T_jup = 3.075 
[ 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 12.7   n/a MPO365488  
diameter diameter 15.320 km 0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19694 Dunkelman           Discovered 1999 Sept. 8 by Catalina Sky Survey.
Lawrence Dunkelman (b. 1917), of the Naval Research Laboratory and NASA Goddard Space Flight Center, measured the solar near-ultraviolet spectral distribution from Mt. Lemmon in 1952 and helped advise the Mercury astronauts on observations of the upper atmosphere and space phenomena from orbit.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 RX230 = 1982 BN15 = 1998 MB29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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