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 ]  
74098 (1998 QA21)
Classification: Main-belt Asteroid          SPK-ID: 2074098
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .115798910846016 3.552e-08  
a 2.566470420789174 1.0643e-08 au
q 2.269275941343271 9.0369e-08 au
i 15.17607348116583 3.6011e-06 deg
node 150.7013978109284 1.7154e-05 deg
peri 134.4317058271676 2.4583e-05 deg
M 142.8963234835153 1.8583e-05 deg
tp 2458404.396905740727
(2018-Oct-12.89690574)
7.6876e-05 TDB
period 1501.767916080042
4.11
9.3413e-06
2.558e-08
d
yr
n .2397174664242943 1.4911e-09 deg/d
Q 2.863664900235076 1.1875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      8125 days (22.25 yr)  
   first obs. used      1998-07-26  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53356  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:45:02  

Additional Information
 Earth MOID = 1.27782 au 
 Jupiter MOID = 2.44576 au 
 T_jup = 3.374 
[ 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 14.6   n/a MPO502605  
diameter diameter 3.020 km 0.576 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.405   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74098 (1998 QA21)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2060-Mar-08 13:21 < 00:01 Thisb 0.0285808729820239 0.0285696250604098 0.0285921243818185 6.84513967794332 6.84513964309218 2473527.056182332 0.727570279518974 750.291647986587 40.0202752360067 -41.6953523524683 71175.6334177005 T 27 CATAB v2.0f-lin.ifort 2020-Nov-12 21:45:05 2020-Nov-12 21:45
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-26 21:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin