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 ]  
27097 (1998 UM26)
Classification: Main-belt Asteroid          SPK-ID: 2027097
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1692684932767807 3.5338e-08  
a 2.255092981057267 6.6083e-09 au
q 1.87337678995466 7.8708e-08 au
i 4.931427343399478 3.8421e-06 deg
node 126.5107164523285 4.2925e-05 deg
peri 170.2121283930528 4.4491e-05 deg
M 217.7551410419636 1.332e-05 deg
tp 2459489.241463486792
(2021-Oct-01.74146349)
4.6683e-05 TDB
period 1236.92995405304
3.39
5.437e-06
1.489e-08
d
yr
n .2910431579576439 1.2793e-09 deg/d
Q 2.636809172159875 7.7269e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2077  
   data-arc span      10369 days (28.39 yr)  
   first obs. used      1991-09-15  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45554  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 00:57:09  

Additional Information
 Earth MOID = .857744 au 
 Jupiter MOID = 2.56057 au 
 T_jup = 3.600 
[ 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 14.5   n/a MPO449161  
diameter diameter 3.239 km 0.629 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.651 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:
[Warner, B.D. (2017) Minor Planet Bull. 44, 289-294.]
geometric albedo albedo 0.321   0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27097 (1998 UM26)          Discovered 1998-Oct-18 by Elst, E. W. at La Silla
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 UM26 = 1991 RB17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-02 10:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin