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91472 (1999 RY91)
Classification: Main-belt Asteroid          SPK-ID: 2091472
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333199149758603 3.791e-08  
a 3.107676093661427 2.6592e-08 au
q 2.693360981081972 1.2161e-07 au
i 12.43511666734495 6.1402e-06 deg
node 181.7418727742467 2.0838e-05 deg
peri 93.98186969316855 3.2751e-05 deg
M 27.1022561743328 2.3761e-05 deg
tp 2459049.854906099717
(2020-Jul-19.35490610)
0.00013171 TDB
period 2001.022846779178
5.48
2.5684e-05
7.032e-08
d
yr
n .1799079908455077 2.3092e-09 deg/d
Q 3.521991206240882 3.0138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      673  
   data-arc span      8125 days (22.25 yr)  
   first obs. used      1998-05-26  
   last obs. used      2020-08-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56703  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:46:02  

Additional Information
 Earth MOID = 1.7128 au 
 Jupiter MOID = 1.73445 au 
 T_jup = 3.170 
[ 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 14.77   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 1.99750481360348 1.99750331394361 1.99750631326233 2.29171722867448 2.09854408710467 2422099.958494134 4.36947655482297 137.720236647081 23.4922270790568 72.626843002639 942202.390142345 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
1929-Mar-27 10:25 00:04 Jupiter 1.72266814865141 1.72266747176823 1.72266882553988 3.30557371958284 3.15332097846829 2425697.934357238 3.50017628118882 291.810948239015 26.7097574570789 82.7268584670818 1531302.10704353 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2000-Aug-09 01:22 < 00:01 Jupiter 1.74407810271259 1.74407748348224 1.74407872194315 3.02627487089819 2.86129813239074 2451765.557063832 0.671607292180199 98.0535308383586 27.0779990505687 87.1884247462048 1832224.65969395 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2010-Sep-27 18:07 < 00:01 Jupiter 1.95466527089922 1.95466466644465 1.95466587535378 4.81735026658377 4.72654165429854 2455467.254996768 0.254196744960637 43.6371846819805 27.7341791691975 -81.0415227268648 2796914.69841066 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2071-Dec-26 20:55 00:03 Jupiter 1.77151677694239 1.77151604181486 1.77151751207174 2.70378906744816 2.52075528339317 2477837.371610985 2.51593757601145 154.527632203109 43.0129477275928 73.5450665919936 1099979.42696632 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2082-Feb-02 23:25 00:03 Jupiter 1.91468504225634 1.91468355042005 1.91468653410112 4.72830651584784 4.63380169850915 2481528.475805128 2.561436987289 234.213211049845 27.5263619501226 -73.88165863292 2652742.70723327 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2143-May-20 10:25 00:06 Jupiter 1.80253584743515 1.80253460928415 1.80253708559118 2.35536842715367 2.14661321978145 2503913.934287236 5.83042879202178 218.745063244635 89.0289388418481 36.503099577757 580518.935571043 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46
2153-Jun-13 11:47 00:05 Jupiter 1.88189017528653 1.88188774341266 1.88189260720448 4.60999570862852 4.51130554392354 2507590.991142024 5.24832533259652 489.047045217589 27.0062383059102 -77.1474092367311 2550767.73245197 T 24 CATAB v2.0f-lin.ifort 2021-Apr-13 14:46:04 2021-Apr-13 14:46

Alternate Designations
 1999 RY91 = 2003 GJ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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