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 ]  
4941 Yahagi (1986 UA)
Classification: Main-belt Asteroid          SPK-ID: 2004941
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 .1740039765711902 3.7407e-08  
a 3.18557317418317 1.5233e-08 au
q 2.63127077421679 1.1956e-07 au
i 1.874911515275254 3.2183e-06 deg
node 129.3231429337525 0.00013404 deg
peri 266.3614294383926 0.00013455 deg
M 4.725339172439318 9.5028e-06 deg
tp 2459173.240976702475
(2020-Nov-19.74097670)
5.4887e-05 TDB
period 2076.728892678221
5.69
1.4896e-05
4.078e-08
d
yr
n .1733495408424408 1.2434e-09 deg/d
Q 3.739875574149551 1.7883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2618  
   data-arc span      18723 days (51.26 yr)  
   first obs. used      1969-10-15  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4708  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:21:20  

Additional Information
 Earth MOID = 1.63795 au 
 Jupiter MOID = 1.69168 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457006.5 (2014-Dec-15.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1763617132108701 3.8983e-08  
q 2.623712002218538 1.2512e-07 au
tp 2457071.215776194495
(2015-Feb-17.71577619)
5.7883e-05 TDB
node 129.7665780366764 0.00013471 deg
peri 262.7391539888663 0.00013517 deg
i 1.871998241689632 3.221e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2618  
   data-arc span      18723 days (51.26 yr)  
   first obs. used      1969-10-15  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4708  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:21:20  

Additional Information
 Jupiter MOID = 1.69168 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.519705948820736E-15 -4.858122440008749E-15 -6.965770181570791E-13 4.984896454052437E-15 -1.443482868407905E-13 -6.334303617943344E-16
q -4.858122440008749E-15 1.565591546391462E-14 1.97469392917438E-12 -1.093965670635778E-14 4.084701066205836E-13 2.224561749226537E-15
tp -6.965770181570791E-13 1.97469392917438E-12 3.350419139441507E-9 -9.988802130971351E-12 6.766784140170545E-10 4.070381728606857E-13
node 4.984896454052437E-15 -1.093965670635778E-14 -9.988802130971351E-12 1.814754382229035E-8 -1.813971616618388E-8 1.289706849091711E-10
peri -1.443482868407905E-13 4.084701066205836E-13 6.766784140170545E-10 -1.813971616618388E-8 1.827090008972356E-8 -1.288435343612781E-10
i -6.334303617943344E-16 2.224561749226537E-15 4.070381728606857E-13 1.289706849091711E-10 -1.288435343612781E-10 1.037511701795063E-11

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 12.64   n/a E2021B10  
diameter diameter 17.560 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.690 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.059   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4941 Yahagi           Discovered 1986 Oct. 25 by K. Suzuki and T. Urata at Toyota.
The Yahagi River flows through Aichi, hometown of the discoverers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120207/MPCPages.arcLast Updated: 2012-02-09

[ show close-approach data ]
Alternate Designations
 1986 UA = 1969 TR5 = 1975 VW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Feb-24 18:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin