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 ]  
27750 (1991 CW2)
Classification: Main-belt Asteroid          SPK-ID: 2027750
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1281778563991138 4.7247e-08  
a 2.484331465369737 9.7254e-09 au
q 2.165895183553774 1.1733e-07 au
i 8.031382503385295 3.8398e-06 deg
node 13.29372076373389 3.5925e-05 deg
peri 81.38477172624471 3.8975e-05 deg
M 233.9660946027734 1.4825e-05 deg
tp 2459501.223103062633
(2021-Oct-13.72310306)
5.9013e-05 TDB
period 1430.252570008154
3.92
8.3985e-06
2.299e-08
d
yr
n .2517037952240475 1.478e-09 deg/d
Q 2.802767747185699 1.0972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1369  
   data-arc span      13800 days (37.78 yr)  
   first obs. used      1981-09-25  
   last obs. used      2019-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 02:55:36  

Additional Information
 Earth MOID = 1.19969 au 
 Jupiter MOID = 2.38423 au 
 T_jup = 3.452 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO435956  
diameter diameter 4.174 km 0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.203   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27750 (1991 CW2)          Discovered 1991-Feb-14 by Helin, E. F. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 CW2 = 1981 SS4 = 1995 GX8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-06 13:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin