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 ]  
16996 Dahir (1999 CM32)
Classification: Main-belt Asteroid          SPK-ID: 2016996
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1749881207065556 2.8103e-08  
a 2.264910156590695 7.2973e-09 au
q 1.868577784719699 6.393e-08 au
i 5.597271196152808 3.8357e-06 deg
node 16.81104795035554 3.4042e-05 deg
peri 241.5819645258025 3.6385e-05 deg
M 48.10477895688391 1.1035e-05 deg
tp 2459034.135515575838
(2020-Jul-03.63551558)
3.831e-05 TDB
period 1245.015894291471
3.41
6.017e-06
1.647e-08
d
yr
n .289152935035318 1.3974e-09 deg/d
Q 2.661242528461691 8.5743e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1718  
   data-arc span      10922 days (29.90 yr)  
   first obs. used      1990-10-13  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49844  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:50:34  

Additional Information
 Earth MOID = .860017 au 
 Jupiter MOID = 2.41108 au 
 T_jup = 3.590 
[ 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 14.8   n/a MPO378736  
diameter diameter 3.398 km 0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.938 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.094   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16996 Dahir           Discovered 1999 Feb. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Roberto Daniel Dahir (b. 1985) was awarded second place in the 2003 Intel International Science and Engineering Fair for his engineering team project. He attends the E.P.E.T. No 6, Realico, La Pampa, Argentina.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

[ show close-approach data ]
Alternate Designations
 1999 CM32 = 1997 SY15 
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-16 09:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin