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
JPL Small-Body Database Browser
Search: [ help ]  
22751 (1998 UA27)
Classification: Main-belt Asteroid          SPK-ID: 2022751
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1407667339569364 1.4151e-08  
a 2.227087152634672 6.0462e-09 au
q 1.913587367920837 3.3733e-08 au
i 4.662719469755484 6.2924e-07 deg
node 110.6889952329036 3.5839e-06 deg
peri 134.3846654142614 6.6626e-06 deg
M 25.7843744896966 6.8587e-06 deg
tp 2459113.552250550477
(2020-Sep-21.05225055)
2.3046e-05 TDB
period 1213.959633356098
3.32
4.9436e-06
1.353e-08
d
yr
n .2965502230125629 1.2076e-09 deg/d
Q 2.540586937348508 6.8973e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2630  
   data-arc span      15797 days (43.25 yr)  
   first obs. used      1977-05-19  
   last obs. used      2020-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47848  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:11:22  

Additional Information
 Earth MOID = .901942 au 
 Jupiter MOID = 2.47954 au 
 T_jup = 3.628 
[ 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 13.91   n/a E2021B10  
diameter diameter 4.425 km 0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.8811 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:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.328   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

22751 (1998 UA27)          Discovered 1998-Oct-18 by Elst, E. W. at La Silla
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UA27 = 1977 KD = 1980 DD4 = 1991 RL16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-16 07:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin