+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22999 Irizarry (1999 VS81) Classification: Main-belt Asteroid          SPK-ID: 2022999 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09714649803510987 2.7152e-08   a 2.636668989347422 1.0551e-08 au q 2.380525830554548 7.4573e-08 au i 2.841329439206187 3.5728e-06 deg node 200.1145231528752 6.1763e-05 deg peri 246.9260700732568 6.5715e-05 deg M 282.479660887992 2.4854e-05 deg tp 2459537.240232176801 (2021-Nov-18.74023218) 0.00010899 TDB period 1563.802286887445 4.28 9.3864e-06 2.57e-08 d yr n .2302081299014695 1.3818e-09 deg/d Q 2.892812148140297 1.1576e-08 au   Orbit Determination Parameters    # obs. used (total)      1746      data-arc span      9214 days (25.23 yr)      first obs. used      1995-11-16      last obs. used      2021-02-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50906      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:15:56   Additional Information  Earth MOID = 1.39823 au   Jupiter MOID = 2.27784 au   T_jup = 3.389  [ 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 14.48   n/a E2021B10   diameter diameter 3.271 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.345   0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22999 Irizarry           Discovered 1999 Nov. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Carmen Irizarry mentored a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Staten Island Technical High School, Staten Island, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070303/MPCPages.arc Last Updated: 2010-04-12 [ show close-approach data ] Alternate Designations  1999 VS81 = 1995 WT41 = 1997 EE52  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 04:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin