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 ]  
91173 (1998 RN7)
Classification: Main-belt Asteroid          SPK-ID: 2091173
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09909197320941364 1.0393e-07  
a 3.045756401169764 3.2012e-08 au
q 2.743946389462649 3.3606e-07 au
i 9.682690948254699 9.7986e-06 deg
node 343.4530882853825 2.4376e-05 deg
peri 20.99490810100085 4.2647e-05 deg
M 13.16948255994136 3.6285e-05 deg
tp 2458929.475630669395
(2020-Mar-20.97563067)
0.00019512 TDB
period 1941.516900352049
5.32
3.0609e-05
8.38e-08
d
yr
n .1854220274542665 2.9233e-09 deg/d
Q 3.347566412876878 3.5185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      432  
   data-arc span      8661 days (23.71 yr)  
   first obs. used      1996-03-20  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58521  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:16:12  

Additional Information
 Earth MOID = 1.74338 au 
 Jupiter MOID = 2.10269 au 
 T_jup = 3.209 
[ 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 14.8   n/a MPO453351  
diameter diameter 3.260 km 0.790 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91173 (1998 RN7)          Discovered 1998-Sep-12 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 RN7 = 1999 XS199 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-21 06:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin