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 ]  
21755 (1999 RE190)
Classification: Main-belt Asteroid          SPK-ID: 2021755
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2070532772026313 5.194e-08  
a 2.535833023989408 8.176e-09 au
q 2.010780485933742 1.3314e-07 au
i 7.164697260954046 2.3768e-06 deg
node 234.9845928313821 4.4218e-05 deg
peri 232.1346969136985 4.5511e-05 deg
M 51.99901126133568 1.1439e-05 deg
tp 2459183.454683205565
(2020-Nov-29.95468321)
4.7078e-05 TDB
period 1474.957161407121
4.04
7.1333e-06
1.953e-08
d
yr
n .2440748853048432 1.1804e-09 deg/d
Q 3.060885562045073 9.8689e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2296  
   data-arc span      25414 days (69.58 yr)  
   first obs. used      1951-11-28  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:53  

Additional Information
 Earth MOID = 1.03689 au 
 Jupiter MOID = 2.13322 au 
 T_jup = 3.407 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457502.5 (2016-Apr-24.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2050024095859331 5.2159e-08  
q 2.01669878358464 1.3356e-07 au
tp 2457708.152146176282
(2016-Nov-15.65214618)
5.0196e-05 TDB
node 235.0130532457281 4.4238e-05 deg
peri 232.1594166356723 4.5585e-05 deg
i 7.159547453975799 2.376e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2296  
   data-arc span      25414 days (69.58 yr)  
   first obs. used      1951-11-28  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:53  

Additional Information
 Jupiter MOID = 2.13322 au 
 T_jup = 3.407 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.720584540100743E-15 -6.958361088065194E-15 2.135386810915566E-12 1.080187847668779E-13 4.986949724431402E-13 -8.441524163763362E-15
q -6.958361088065194E-15 1.783819797164888E-14 -5.52575003495016E-12 -2.778815888196509E-13 -1.291931084238942E-12 2.169355313743958E-14
tp 2.135386810915566E-12 -5.52575003495016E-12 2.519652481777749E-9 1.047569299955647E-10 6.133183550212251E-10 -7.392372328231485E-12
node 1.080187847668779E-13 -2.778815888196509E-13 1.047569299955647E-10 1.956960813002522E-9 -1.912569350564829E-9 -4.474710846211556E-13
peri 4.986949724431402E-13 -1.291931084238942E-12 6.133183550212251E-10 -1.912569350564829E-9 2.07798847723786E-9 -1.65854874719647E-12
i -8.441524163763362E-15 2.169355313743958E-14 -7.392372328231485E-12 -4.474710846211556E-13 -1.65854874719647E-12 5.645267574466181E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.92   n/a MPO614063  
rotation period rot_per 1.90 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:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

21755 (1999 RE190)          Discovered 1999-Sep-10 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RE190 = 1987 QV4 = 1987 SH24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 16:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin