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 ]  
27827 Ukai (1993 XJ1)
Classification: Main-belt Asteroid          SPK-ID: 2027827
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070210215563383 4.4321e-08  
a 2.756756564039966 1.8448e-08 au
q 2.461725660374268 1.256e-07 au
i 6.987264862556192 4.7631e-06 deg
node 80.99470747512608 4.0527e-05 deg
peri 334.5549248426559 4.7423e-05 deg
M 212.6382368615027 2.7544e-05 deg
tp 2459284.850141185435
(2021-Mar-11.35014119)
0.00013134 TDB
period 1671.84516240628
4.58
1.6782e-05
4.595e-08
d
yr
n .2153309457688376 2.1615e-09 deg/d
Q 3.051787467705664 2.0422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1135  
   data-arc span      8986 days (24.60 yr)  
   first obs. used      1993-12-04  
   last obs. used      2018-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5507  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 18:36:23  

Additional Information
 Earth MOID = 1.47553 au 
 Jupiter MOID = 2.25943 au 
 T_jup = 3.324 
[ 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 13.8   n/a MPO347730  
diameter diameter 9.202 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.109   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27827 Ukai           Discovered 1993 Dec. 9 by M. Hirasawa and S. Suzuki at Nyukasa.
Kazuhiko Ukai (1951-2009) was a physicist at Waseda University. A member of the Waseda Astronomical Association, he participated in the construction of an observatory hut in Nobeyama in 1970, camping out there for 30 consecutive days and becoming the first person to spend 100 nights in the hut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100130/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1993 XJ1 = 1998 WF9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-07 14:54 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin