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 ]  
2475 Semenov (1972 TF2)
Classification: Main-belt Asteroid          SPK-ID: 2002475
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1017054551192 1.221e-08  
a 3.040125302374435 1.2388e-08 au
q 2.730927974877047 3.527e-08 au
i 9.083924673752069 5.3273e-07 deg
node 209.9592202678148 1.7629e-06 deg
peri 181.0981784158192 1.2322e-05 deg
M 40.14610850789192 1.0244e-05 deg
tp 2458984.588086609575
(2020-May-15.08808661)
5.489e-05 TDB
period 1936.135075340442
5.30
1.1835e-05
3.24e-08
d
yr
n .1859374403083417 1.1365e-09 deg/d
Q 3.349322629871823 1.3648e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2929  
   data-arc span      41092 days (112.50 yr)  
   first obs. used      1908-09-21  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44464  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:16:17  

Additional Information
 Earth MOID = 1.73527 au 
 Jupiter MOID = 2.08366 au 
 T_jup = 3.213 
[ 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 11.70   n/a E2021B10  
diameter diameter 14.494 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.0 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. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.171   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2475 Semenov (1972 TF2)          Discovered 1972-Oct-08 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1972 TF2 = 1961 TC1 = 1972 TK4 = 1977 RW4 = 1977 TF4 = A908 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-24 00:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin