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 ]  
4799 Hirasawa (1989 TC1)
Classification: Main-belt Asteroid          SPK-ID: 2004799
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .127956230192026 2.0418e-08  
a 2.469994024865138 7.5648e-09 au
q 2.153942900846566 5.0199e-08 au
i .6166126030584091 1.2576e-06 deg
node 241.5343029162842 0.00010362 deg
peri 82.00307097106004 9.8801e-05 deg
M 56.04815996212054 8.8479e-06 deg
tp 2458979.749782802064
(2020-May-10.24978280)
3.4808e-05 TDB
period 1417.889155415018
3.88
6.5138e-06
1.783e-08
d
yr
n .2538985495623088 1.1664e-09 deg/d
Q 2.78604514888371 8.5327e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2640  
   data-arc span      15919 days (43.58 yr)  
   first obs. used      1977-08-18  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43621  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:51:55  

Additional Information
 Earth MOID = 1.13976 au 
 Jupiter MOID = 2.49991 au 
 T_jup = 3.473 
[ 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 13.87   n/a MPCxxxxx  
diameter diameter 7.863 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.104   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4799 Hirasawa (1989 TC1)          Discovered 1989-Oct-08 by Mizuno and Furuta at Kani
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 TC1 = 1977 QM4 = 1985 TT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-12 17:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin