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 ]  
21912 (1999 VL24)
Classification: Main-belt Asteroid          SPK-ID: 2021912
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1645282999238739 2.2076e-08  
a 2.6563110731374 9.6283e-09 au
q 2.219272728205142 6.1254e-08 au
i 12.17128084460544 8.2716e-07 deg
node 342.770899128278 6.2511e-06 deg
peri 78.7955922209359 9.3814e-06 deg
M 348.3220855438562 8.5648e-06 deg
tp 2459447.795541019941
(2021-Aug-21.29554102)
3.7746e-05 TDB
period 1581.309302832197
4.33
8.5977e-06
2.354e-08
d
yr
n .2276594461028109 1.2378e-09 deg/d
Q 3.093349418069657 1.1212e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2064  
   data-arc span      25561 days (69.98 yr)  
   first obs. used      1951-08-11  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:17  

Additional Information
 Earth MOID = 1.26842 au 
 Jupiter MOID = 2.34268 au 
 T_jup = 3.337 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457526.5 (2016-May-18.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668950015242781 2.224e-08  
q 2.213218975239394 6.1872e-08 au
tp 2457861.788860395889
(2017-Apr-18.28886040)
3.391e-05 TDB
node 343.0159119298413 6.2641e-06 deg
peri 77.81356581034832 9.2745e-06 deg
i 12.16250373324744 8.277e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2064  
   data-arc span      25561 days (69.98 yr)  
   first obs. used      1951-08-11  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:17  

Additional Information
 Jupiter MOID = 2.34268 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.946147501181718E-16 -1.365227917867119E-15 -3.252360440265155E-13 3.04791360953905E-14 -6.559698082067184E-14 -3.060882713938215E-15
q -1.365227917867119E-15 3.828194715550049E-15 9.373704423848207E-13 -8.440659468441456E-14 1.841348141374715E-13 8.109227218243866E-15
tp -3.252360440265155E-13 9.373704423848207E-13 1.149881762261724E-9 -5.453277065427833E-11 2.460552517444156E-10 -1.073223519357349E-12
node 3.04791360953905E-14 -8.440659468441456E-14 -5.453277065427833E-11 3.923873373068823E-11 -4.552018365682135E-11 1.173405590661552E-12
peri -6.559698082067184E-14 1.841348141374715E-13 2.460552517444156E-10 -4.552018365682135E-11 8.601636915886993E-11 -1.501161726853363E-12
i -3.060882713938215E-15 8.109227218243866E-15 -1.073223519357349E-12 1.173405590661552E-12 -1.501161726853363E-12 6.850907364975244E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.73   n/a MPO636392  
diameter diameter 5.935 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.1111 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.347   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21912 (1999 VL24)          Discovered 1999-Nov-15 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VL24 = 1990 RX4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-16 15:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin