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 ]  
21695 Hannahwolf (1999 RG49)
Classification: Main-belt Asteroid          SPK-ID: 2021695
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2155730661322079 4.2234e-08  
a 2.440090142644879 9.2101e-09 au
q 1.914072428955946 1.0494e-07 au
i 3.331253687288556 4.676e-06 deg
node 112.5005551962471 8.1437e-05 deg
peri 212.6785262594907 8.2122e-05 deg
M 57.27126103704181 1.0956e-05 deg
tp 2458379.016449104708
(2018-Sep-17.51644910)
4.2034e-05 TDB
period 1392.217962002527
3.81
7.8824e-06
2.158e-08
d
yr
n .2585802006764704 1.464e-09 deg/d
Q 2.966107856333812 1.1196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1110  
   data-arc span      15493 days (42.42 yr)  
   first obs. used      1976-06-30  
   last obs. used      2018-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57423  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:59:16  

Additional Information
 Earth MOID = .902178 au 
 Jupiter MOID = 2.36917 au 
 T_jup = 3.468 
[ 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 15.0   n/a MPO449112  
diameter diameter 2.178 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.372   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21695 Hannahwolf           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Hannah Louise Wolf (b. 1990) was awarded first place and Best in Category in the 2006 Intel International Science and Engineering Fair for her earth science project. She also received the Intel Foundation Young Scientist Award. She attends the Parkland High School, Allentown, Pennsylvania, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1999 RG49 = 1976 MP = 1998 GY12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin