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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
49027 (1998 QA99)
Classification: Main-belt Asteroid          SPK-ID: 2049027
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396263139643102 3.8403e-08  
a 2.338002756296658 8.4261e-09 au
q 2.011556049396558 9.0778e-08 au
i 4.987479162554856 4.8326e-06 deg
node 149.5748621444042 4.9951e-05 deg
peri 159.7487032540155 5.2882e-05 deg
M 310.1543688188788 1.7541e-05 deg
tp 2458781.296722821106
(2019-Oct-24.79672282)
6.3871e-05 TDB
period 1305.767800975292
3.57
7.059e-06
1.933e-08
d
yr
n .2756998600601976 1.4904e-09 deg/d
Q 2.664449463196758 9.6027e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      7709 days (21.11 yr)  
   first obs. used      1998-08-23  
   last obs. used      2019-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52757  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:39:46  

Additional Information
 Earth MOID = .997167 au 
 Jupiter MOID = 2.57586 au 
 T_jup = 3.548 
[ 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 14.9   n/a MPO493203  
diameter diameter 2.901 km 0.662 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.303   0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49027 (1998 QA99)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QA99 = 2001 HJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-20 03:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin