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 ]  
21588 Gianelli (1998 SK157)
Classification: Main-belt Asteroid          SPK-ID: 2021588
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1604018925109784 3.1721e-08  
a 3.0875417642739 1.4982e-08 au
q 2.592294222077681 9.4281e-08 au
i 2.574751949713175 3.2689e-06 deg
node 131.1358992482257 8.3467e-05 deg
peri 130.4594526213795 8.4252e-05 deg
M 166.5927759877977 1.2853e-05 deg
tp 2458479.495741590443
(2018-Dec-26.99574159)
6.8673e-05 TDB
period 1981.607732208153
5.43
1.4423e-05
3.949e-08
d
yr
n .1816706677859211 1.3223e-09 deg/d
Q 3.582789306470118 1.7385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1548  
   data-arc span      10889 days (29.81 yr)  
   first obs. used      1991-04-21  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:01:25  

Additional Information
 Earth MOID = 1.57776 au 
 Jupiter MOID = 1.49204 au 
 T_jup = 3.204 
[ 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 14.07   n/a MPCxxxxx  

21588 Gianelli           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Gabrielle Alyce Gianelli (b. 1988) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for her space science project. She also received the Intel Young Scientist Award. She attends the Lake Highland Preparatory School, Orlando, Florida, 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: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ 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
1918-Mar-25 20:42 00:03 Jupiter 1.52859061894443 1.52858979807705 1.52859143980885 1.23217058575427 0.640315947684433 2421678.362303786 2.50307450044613 778.850179368969 157.48155962568 -7.00003852060756 1403112.5275045 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
1928-Jan-02 18:40 00:02 Jupiter 1.79036338336006 1.79036208088452 1.79036468583753 2.63602293512789 2.44998268021629 2425248.278113102 2.22789758090447 127.186740944068 9.59324750444981 -78.0516769022284 2764576.0906495 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
1978-Sep-09 19:13 < 00:01 Jupiter 1.78583462434528 1.78583387776817 1.78583537092188 1.98899147421578 1.73421042492844 2443761.300835283 0.944089442884447 49.7987800003306 12.3582071194721 87.4117316714218 1770069.1831618 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
1988-Jun-23 13:12 < 00:01 Jupiter 1.5342601753364 1.53425982920562 1.53426052146657 1.41257550317873 0.944047135880057 2447336.050024923 0.700691455934516 165.78159863763 92.7440955916544 21.0987910994988 2241724.61279667 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2048-Dec-02 08:53 < 00:01 Jupiter 1.54185156818843 1.54185128430533 1.54185185207092 1.25279650972783 0.68614200800794 2469412.870186940 0.895212383479742 350.671665354819 136.002459891414 -10.9573183372534 2616823.89870481 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2058-Sep-12 17:13 00:01 Jupiter 1.76817593226791 1.76817517895478 1.76817668558123 2.52077483590136 2.32297887401605 2472984.217283570 1.14639398848968 68.2540540773915 7.96514014128734 -82.0911653691656 2685479.69905633 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2109-May-15 05:43 00:02 Jupiter 1.80573094008688 1.80572962674771 1.80573225342574 2.03892297533083 1.79417326571771 2491490.738475158 2.40661300335646 90.347717335742 9.01922335359334 -89.2708911405499 1785934.74305273 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2119-Mar-01 19:42 00:03 Jupiter 1.53216302522097 1.53216223083929 1.53216381960143 1.37204512178669 0.881392057778695 2495068.321167952 2.73076056952181 478.914580025362 104.028761126131 17.6655224636604 1400751.11340108 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2179-Aug-07 14:55 00:04 Jupiter 1.56007514867561 1.56007399619988 1.56007630114663 1.28831554843823 0.757550635269071 2517142.121636803 4.27806279252622 547.336864725445 136.098837785019 4.21828403693431 1060850.75624648 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01
2189-May-19 08:31 00:05 Jupiter 1.74703620862194 1.74703373096235 1.74703868628987 2.41594692260911 2.20615765098347 2520714.855143151 4.55665556547363 254.547353956486 6.24920427413474 -84.780663094106 2639287.90251293 T 35 CATAB v2.0g-lin.ifort 2021-Aug-25 15:01:33 2021-Aug-25 15:01

Alternate Designations
 1998 SK157 = 1997 ML3 
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-26 04:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin