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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
91021 (1998 DQ28)
Classification: Main-belt Asteroid          SPK-ID: 2091021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1731218264081532 3.8735e-08  
a 2.649066272295554 1.4628e-08 au
q 2.19045508095951 1.0745e-07 au
i 10.60837009466981 4.9968e-06 deg
node 9.330024628886598 2.0258e-05 deg
peri 301.0828661588401 2.501e-05 deg
M 26.12929961142447 1.5701e-05 deg
tp 2459282.195604885330
(2021-Mar-08.69560489)
6.8473e-05 TDB
period 1574.844441038497
4.31
1.3044e-05
3.571e-08
d
yr
n .2285940062515671 1.8934e-09 deg/d
Q 3.107677463631599 1.716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1193  
   data-arc span      8565 days (23.45 yr)  
   first obs. used      1998-02-26  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52154  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:01:22  

Additional Information
 Earth MOID = 1.19831 au 
 Jupiter MOID = 2.27101 au 
 T_jup = 3.346 
[ 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 14.35   n/a MPO637237  
diameter diameter 3.844 km 0.271 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.274   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91021 (1998 DQ28)          Discovered 1998-Feb-26 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 DQ28 = 2000 XA23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-25 15:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin