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 ]  
66581 (1999 RF155)
Classification: Main-belt Asteroid          SPK-ID: 2066581
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06758782206006236 2.7837e-08  
a 2.513555978305558 1.0696e-08 au
q 2.343670204105836 6.9987e-08 au
i 4.08761084408172 3.1945e-06 deg
node 234.9839560475552 5.8121e-05 deg
peri 199.3397210236853 6.7687e-05 deg
M 39.79893291905545 3.421e-05 deg
tp 2459039.583641288368
(2020-Jul-09.08364129)
0.00013861 TDB
period 1455.563877906162
3.99
9.291e-06
2.544e-08
d
yr
n .2473268301476829 1.5787e-09 deg/d
Q 2.68344175250528 1.1419e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      7864 days (21.53 yr)  
   first obs. used      1999-09-07  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51175  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:02:09  

Additional Information
 Earth MOID = 1.35835 au 
 Jupiter MOID = 2.48876 au 
 T_jup = 3.453 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457588.5 (2016-Jul-19.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06632067787027358 2.7608e-08  
q 2.346418269195405 6.9155e-08 au
tp 2457579.505388092058
(2016-Jul-10.00538809)
0.00014526 TDB
node 235.0138053873164 5.8173e-05 deg
peri 198.2215578415978 6.8196e-05 deg
i 4.084727472059922 3.1946e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      7864 days (21.53 yr)  
   first obs. used      1999-09-07  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51175  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:02:09  

Additional Information
 Jupiter MOID = 2.48876 au 
 T_jup = 3.453 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.62197591371844E-16 -1.889559765168323E-15 4.340630333431466E-13 2.003353351263322E-15 1.095617725055615E-13 -5.962239840845461E-16
q -1.889559765168323E-15 4.782367293054775E-15 -1.567557315723031E-12 -7.614022325301081E-15 -3.934010154977632E-13 1.583332436436914E-15
tp 4.340630333431466E-13 -1.567557315723031E-12 2.109947456198707E-8 1.149956298298227E-10 5.191958649388218E-9 -1.77547039306995E-12
node 2.003353351263322E-15 -7.614022325301081E-15 1.149956298298227E-10 3.384059619222745E-9 -3.346658464792631E-9 -1.865505244131871E-11
peri 1.095617725055615E-13 -3.934010154977632E-13 5.191958649388218E-9 -3.346658464792631E-9 4.650755214632243E-9 1.815103437967599E-11
i -5.962239840845461E-16 1.583332436436914E-15 -1.77547039306995E-12 -1.865505244131871E-11 1.815103437967599E-11 1.020531159026321E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.64   n/a MPCxxxxx  

66581 (1999 RF155)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RF155 = 2002 JR57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-15 09:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin