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 ]  
2230 Yunnan (1978 UT1)
Classification: Main-belt Asteroid          SPK-ID: 2002230
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06241734803948951 2.1185e-08  
a 2.861544338075223 1.1538e-08 au
q 2.682934329195152 6.5193e-08 au
i 2.568828784732175 3.1123e-07 deg
node 153.7042338936906 8.1796e-06 deg
peri 253.3895926269049 1.5404e-05 deg
M 257.5762030366198 1.6887e-05 deg
tp 2459703.534204903196
(2022-May-04.03420490)
8.4143e-05 TDB
period 1768.068741192018
4.84
1.0694e-05
2.928e-08
d
yr
n .2036119929122727 1.2315e-09 deg/d
Q 3.040154346955295 1.2258e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2604  
   data-arc span      25878 days (70.85 yr)  
   first obs. used      1949-11-21  
   last obs. used      2020-09-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:30:36  

Additional Information
 Earth MOID = 1.69278 au 
 Jupiter MOID = 2.20416 au 
 T_jup = 3.297 
[ 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 12.03   n/a E2021B10  
diameter diameter 11.431 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.0381 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.258   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2230 Yunnan           Discovered 1978 Oct. 29 at the Purple Mountain Observatory.
Named for a province along the southwestern border of China. The Yunnan Observatory is situated in its capital city of Kunming.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 6059Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1978 UT1 = 1953 RW = 1956 EY = 1964 YK = 1976 JW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-14 02:10 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin