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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
(2016 GW221)
Classification: Aten [NEO]          SPK-ID: 3752012
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2682127697417585 7.9945e-08  
a .8266760917986643 1.1396e-09 au
q .6049510075380524 6.6058e-08 au
i 3.694410427105953 3.6389e-06 deg
node 33.59681146131916 1.3228e-05 deg
peri 8.229319482867597 2.7417e-05 deg
M 331.1067524968652 3.9151e-05 deg
tp 2459022.534101737815
(2020-Jun-22.03410174)
2.9858e-05 TDB
period 274.5373854134147
0.75
5.677e-07
1.554e-09
d
yr
n 1.311296818310885 2.7116e-09 deg/d
Q 1.048401176059276 1.4453e-09 au
  Orbit Determination Parameters
   # obs. used (total)      199  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      1112 days (3.04 yr)  
   first obs. used      2016-04-14  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41435  
   source      ORB  
   producer      Giorgini  
   solution date      2019-Jul-13 18:10:29  

Additional Information
 Earth MOID = .02214 au 
 Jupiter MOID = 4.28571 au 
 T_jup = 7.061 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 24.7   n/a MPO466816  
rotation period rot_per 0.2856 h n/a LCDB (Rev. 2019-August); 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:
[Thirouin, A.; Moskovitz, N.A.; Binzel, R.P.; Christensen, E.J.; et al. (2018) Astrophys. J. Supp. Series 2391, A4.]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-28 19:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin