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2251 Tikhov (1977 SU1)
Classification: Main-belt Asteroid          SPK-ID: 2002251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494251549092402 3.9604e-08  
a 2.709034841686153 1.0541e-08 au
q 2.304236890812671 1.0836e-07 au
i 7.440374864113174 4.3998e-06 deg
node 192.9860859304111 2.502e-05 deg
peri 183.410315427095 2.7569e-05 deg
M 206.5044551101003 1.3493e-05 deg
tp 2459694.906195497230
6.3019e-05 TDB
period 1628.622059085262
n .2210457595067815 1.2902e-09 deg/d
Q 3.113832792559636 1.2116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3014  
   data-arc span      23611 days (64.64 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42796  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:47:57  

Additional Information
 Earth MOID = 1.30562 au 
 Jupiter MOID = 2.34811 au 
 T_jup = 3.336 
[ 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 11.6   n/a MPO384769  
diameter diameter 29.488 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.670 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[LeCrone, C.; Addleman, D.; Butler, T.; Hudson, E.; et al. (2005) Minor Planet Bull. 32, 46-48.]
[Aznar Macias, A.; Cornea, R.; Suciu, O. (2018) Minor Planet Bull. 45, 92-96.]
geometric albedo albedo 0.059   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2251 Tikhov           Discovered 1971 Sept. 19 by N. Chernykh at the Crimean Astrophysical Observatory.
Named in memory of Gavriil Adrianovich Tikhov (1875-1960), active on the staff of the Pulkovo Observatory during 1906-1941 and from 1947 head of the astrobotanical department of the Kazakh Academy of Sciences. His principal scientific work was concerned with stellar and planetary photometry and colorimetry and with atmospheric optics. He was also known for his research on the physical nature of Mars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5451Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1977 SU1 = 1941 QF = 1950 SS = 1952 BO1 = 1955 XV = 1975 ED5 = 1976 ND 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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