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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
91472 (1999 RY91)
Classification: Main-belt Asteroid          SPK-ID: 2091472
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1332161371947276 3.6956e-08  
a 3.105329480945904 2.5908e-08 au
q 2.691649482777382 1.1711e-07 au
i 12.44582805604569 6.1414e-06 deg
node 181.7109717045046 2.0373e-05 deg
peri 93.63295339165147 3.2427e-05 deg
M 62.71398223936549 2.3922e-05 deg
tp 2459048.305558122667
(2020-Jul-17.80555812)
0.00013186 TDB
period 1998.756809883422
5.47
2.5014e-05
6.848e-08
d
yr
n .1801119567022249 2.2541e-09 deg/d
Q 3.519009479114426 2.936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      683  
   data-arc span      8475 days (23.20 yr)  
   first obs. used      1998-05-26  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56391  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:21  

Additional Information
 Earth MOID = 1.7128 au 
 Jupiter MOID = 1.73381 au 
 T_jup = 3.171 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456782.5 (2014-May-05.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307833092578903 3.7179e-08  
q 2.699147011178153 1.1715e-07 au
tp 2457052.962075288061
(2015-Jan-30.46207529)
0.00013189 TDB
node 181.8493476632733 2.0405e-05 deg
peri 94.30224534843245 3.2776e-05 deg
i 12.43150910181262 6.1368e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      683  
   data-arc span      8475 days (23.20 yr)  
   first obs. used      1998-05-26  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56391  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:21  

Additional Information
 Jupiter MOID = 1.73381 au 
 T_jup = 3.171 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.382283924148829E-15 -4.278891926150857E-15 -7.538054416914934E-14 -3.284893188417623E-15 -4.009227426771774E-16 -3.222528703212958E-15
q -4.278891926150857E-15 1.372472794547572E-14 2.162997080639262E-13 8.353316321203024E-15 -1.333854981614661E-14 1.218748961241422E-14
tp -7.538054416914934E-14 2.162997080639262E-13 1.739466499404474E-8 -6.290680069368287E-11 3.400571243738006E-9 -5.468166089211462E-12
node -3.284893188417623E-15 8.353316321203024E-15 -6.290680069368287E-11 4.163787987480919E-10 -4.182108163970249E-10 1.262029811741698E-11
peri -4.009227426771774E-16 -1.333854981614661E-14 3.400571243738006E-9 -4.182108163970249E-10 1.074274420781661E-9 -1.332904445107677E-11
i -3.222528703212958E-15 1.218748961241422E-14 -5.468166089211462E-12 1.262029811741698E-11 -1.332904445107677E-11 3.766091931339008E-11

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 14.77   n/a E2021B10  
diameter diameter 4.236 km 0.311 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 51.997 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.142   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91472 (1999 RY91)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ 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
1919-May-21 11:00 00:04 Jupiter 1.99750480763112 1.99750332781426 1.99750628744696 2.29171705895884 2.09854390116238 2422099.958448315 4.2341074488681 134.968198733235 23.0194460552989 72.724869586076 944802.994265021 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
1929-Mar-27 10:25 00:03 Jupiter 1.72266813709589 1.72266746546566 1.72266880873102 3.30557398398129 3.15332125458681 2425697.934316508 3.39689995567971 284.216343530405 26.5510963337771 82.7654044440561 1537391.95015574 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2000-Aug-09 01:22 < 00:01 Jupiter 1.74407809549205 1.74407747710755 1.74407871387664 3.02627499051527 2.861298258202 2451765.557059354 0.665403585419893 97.9376891508784 26.804383858404 87.1742221461318 1843978.24501672 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2010-Sep-27 18:07 < 00:01 Jupiter 1.9546652682223 1.9546646738684 1.9546658625762 4.81735027990851 4.72654166775373 2455467.254995441 0.252909946166591 42.9014922579816 27.2870804024225 -81.2980311183895 2816874.62442671 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2071-Dec-26 20:55 00:02 Jupiter 1.77151677919608 1.77151605720535 1.77151750118843 2.7037890179004 2.52075523048901 2477837.371642347 2.41143138410041 150.347412729905 42.072938777455 74.1218616029799 1116271.21472866 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2082-Feb-02 23:25 00:02 Jupiter 1.91468501797888 1.91468359826001 1.91468643770547 4.72830644075532 4.63380162067465 2481528.475835762 2.45725898549437 224.624522247084 27.2287592587263 -74.1242514236492 2666432.3075041 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2143-May-20 10:25 00:06 Jupiter 1.80253586176798 1.80253466571566 1.80253705782502 2.35536846184377 2.14661325958574 2503913.934330925 5.6106831791427 211.15060495374 88.0804315486228 37.068984114653 591915.465739566 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02
2153-Jun-13 11:47 00:05 Jupiter 1.88189013503002 1.88188780847087 1.88189246162983 4.60999556612401 4.51130539616735 2507590.991199157 5.05136857596019 470.47399136443 26.7476384776215 -77.2488952783042 2559198.7525304 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 02:02:23 2021-Aug-25 02:02

Alternate Designations
 1999 RY91 = 2003 GJ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 02:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin