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21078 (1991 RR16)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021078
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08875237341120705 4.4916e-08  
a 3.394719110174021 2.6813e-08 au
q 3.093429732081696 1.5946e-07 au
i 8.077975951162689 6.2177e-06 deg
node 23.47018693777654 3.2368e-05 deg
peri 282.7000153800696 5.0372e-05 deg
M 317.4500543367058 4.1739e-05 deg
tp 2459666.522966230453
(2022-Mar-28.02296623)
0.00026601 TDB
period 2284.568554145535
6.25
2.7067e-05
7.411e-08
d
yr
n .1575789876590706 1.8669e-09 deg/d
Q 3.696008488266346 2.9192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      13077 days (35.80 yr)  
   first obs. used      1985-10-18  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:40:16  

Additional Information
 Earth MOID = 2.09221 au 
 Jupiter MOID = 1.58694 au 
 T_jup = 3.126 
[ 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 12.69   n/a MPO636381  
diameter diameter 14.807 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21078 (1991 RR16)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ 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
1904-May-26 01:15 00:05 Jupiter 1.66765512241029 1.66765362872719 1.66765661610201 3.59161533141695 3.44729983234456 2416626.551846577 4.7082975140095 228.330982235191 26.7433609938808 -75.3347780042843 2047215.78654696 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
1917-Aug-29 03:21 00:04 Jupiter 1.53622840375852 1.53622774981885 1.53622905769846 2.56944698039721 2.3450645762349 2421469.639681714 4.26590438049516 95.6328567955773 31.153133007335 -68.2792349238069 869695.706166026 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
1931-Jan-05 20:00 00:04 Jupiter 1.57705957809141 1.57705883779568 1.57706031839145 1.54898437214608 1.15116163714363 2426347.333468386 3.86311700167977 297.063668301696 78.5789629608445 -69.6899043939831 1978078.50241299 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
1944-May-08 11:47 00:03 Jupiter 1.68907499520829 1.68907425919497 1.68907573122141 2.35130096591826 2.12736310426672 2431218.991257791 2.86042374604423 124.799211691525 23.5064401711326 85.6355427618445 1346823.74097689 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
1957-Jul-22 01:14 00:02 Jupiter 1.8505422730457 1.85054145655152 1.85054308953977 3.2886002145334 3.14634068257847 2436041.551199398 2.10877654863731 110.501296075647 32.4373348640334 86.879327762921 1916458.1027768 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2010-May-12 14:18 < 00:01 Jupiter 1.83090385803406 1.83090328049475 1.83090443557337 4.08424655853012 3.96936005930038 2455329.095726615 0.347644419368764 53.3648962299845 25.1454865610637 86.2030417958054 2681456.47436713 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2023-Aug-10 16:45 < 00:01 Jupiter 1.61634246118259 1.61634181768291 1.61634310468254 3.31518333271047 3.15315198636055 2460167.198160906 0.552489588907102 78.9656802521166 21.2747191008844 -79.1250874033479 2079203.84737068 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2036-Nov-27 22:20 00:01 Jupiter 1.56444484559836 1.56444416106178 1.56444553013565 2.02240170562939 1.73414753067926 2465025.430456860 1.18428243643547 88.6725304732458 30.4347127381271 -69.1984845095854 1721216.97482521 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2050-Apr-16 10:01 00:02 Jupiter 1.60645767611715 1.60645697340267 1.6064583788308 1.76725600073275 1.43828777868864 2469912.917099019 1.8452364173572 100.692959177869 88.261436169003 -82.6578453935559 1175475.96199894 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2063-Jul-21 01:15 00:02 Jupiter 1.72075151043491 1.72075066418855 1.72075235668098 2.74550655027776 2.55994657453005 2474756.552270231 2.27346987403626 118.046670628207 24.8411874230917 87.2422243241837 1363564.85748213 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2076-Sep-22 17:27 00:03 Jupiter 1.90320160054264 1.90320061994619 1.90320258113921 3.45255743007435 3.3211519138608 2479569.227070346 2.76935311748132 86.1953961599008 35.0045833623157 74.8099511069686 1744555.01392921 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2116-May-05 20:00 00:04 Jupiter 1.98168386347267 1.98168224875134 1.98168547819423 4.36668719224883 4.26768154122127 2494038.333040665 4.4724649065891 90.6843226131812 42.7366700659406 -35.0141658038092 2581635.36310292 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2129-Jul-29 18:08 00:05 Jupiter 1.74540010456122 1.74539831397392 1.74540189515586 3.95879917658194 3.83425534110388 2498871.255351681 5.00970352828883 218.260616049835 32.2533635653405 -70.2858947424055 2301073.70965929 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2142-Nov-01 21:03 00:06 Jupiter 1.60624873257166 1.60624786500789 1.60624960013516 2.85329548908108 2.66207361584979 2503714.376902558 5.81360675655609 74.0523736071738 28.5044042919466 -80.7454863558311 722608.801028224 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2156-Mar-13 16:49 00:07 Jupiter 1.59098697676066 1.59098627197132 1.59098768155306 1.64847787350937 1.28557501834791 2508595.201030306 6.9112434468779 370.271271605129 53.8387594095528 -71.0076154705944 1922429.31631187 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2169-Jul-14 20:49 00:07 Jupiter 1.62469750676952 1.6246964248662 1.62469858867146 2.21624094385512 1.96698769228024 2513466.367161373 6.91433994371546 125.984697197566 55.6165674598016 70.9853512787695 671758.336919483 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2182-Sep-26 18:15 00:07 Jupiter 1.76574962312403 1.76574751222264 1.76575173402532 3.00592383051734 2.84186323808033 2518288.260107579 7.11108798491796 144.919903960028 66.1733480314663 -71.8695183776176 959386.523464801 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40
2195-Dec-01 01:51 00:08 Jupiter 1.96415582781108 1.96415366610042 1.96415798952286 3.52151495921649 3.39684966651718 2523101.576937840 7.7336760423217 137.391284411684 37.53228448304 48.5096018906642 1604175.016374 T 26 CATAB v2.0g-lin.ifort 2021-Aug-24 22:40:22 2021-Aug-24 22:40

Alternate Designations
 1991 RR16 = 1985 UC6 = 1998 WF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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