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1794 Finsen (1970 GA)
Classification: Main-belt Asteroid          SPK-ID: 2001794
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.

Note: If the applet is not working, here are some notes that might help.
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509892673895823 3.37e-08  
a 3.13113897884515 1.3013e-08 au
q 2.658370598334356 1.0534e-07 au
i 14.57895440069491 4.2573e-06 deg
node 221.0618347210775 1.3124e-05 deg
peri 341.2045538627111 1.8916e-05 deg
M 34.43794982460469 1.2461e-05 deg
tp 2458806.908300677552
(2019-Nov-19.40830068)
7.0429e-05 TDB
period 2023.727083378473
5.54
1.2616e-05
3.454e-08
d
yr
n .1778895993223576 1.109e-09 deg/d
Q 3.603907359355944 1.4978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3000  
   data-arc span      25587 days (70.05 yr)  
   first obs. used      1950-10-05  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44261  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:26  

Additional Information
 Earth MOID = 1.65824 au 
 Jupiter MOID = 1.39673 au 
 T_jup = 3.146 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457083.5 (2015-Mar-02.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1507140624631941 3.3592e-08  
q 2.659337938670029 1.049e-07 au
tp 2456779.311187538992
(2014-May-01.81118754)
7.564e-05 TDB
node 221.0922461256228 1.3124e-05 deg
peri 340.5977577206688 1.8967e-05 deg
i 14.57812467619831 4.2572e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3000  
   data-arc span      25587 days (70.05 yr)  
   first obs. used      1950-10-05  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44261  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:15:26  

Additional Information
 Jupiter MOID = 1.39673 au 
 T_jup = 3.146 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.128419251611098E-15 -3.504134575603136E-15 7.982483388383854E-13 -1.544080415914596E-15 1.483543655943272E-13 -2.046872299747014E-15
q -3.504134575603136E-15 1.100329292258107E-14 -2.872566387303911E-12 -4.824085922387752E-15 -5.224924565265856E-13 5.296458240544959E-15
tp 7.982483388383854E-13 -2.872566387303911E-12 5.72133674689595E-9 1.230504141848168E-11 1.042103485045138E-9 -1.860594183823155E-12
node -1.544080415914596E-15 -4.824085922387752E-15 1.230504141848168E-11 1.722433442932747E-10 -1.65853604511951E-10 1.469238682532068E-11
peri 1.483543655943272E-13 -5.224924565265856E-13 1.042103485045138E-9 -1.65853604511951E-10 3.597491886887919E-10 -1.483773055994702E-11
i -2.046872299747014E-15 5.296458240544959E-15 -1.860594183823155E-12 1.469238682532068E-11 -1.483773055994702E-11 1.812404878384452E-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 11.0   n/a MPO473788 IRAS observations used: 5
diameter diameter 38.050 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.346 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Hills, K. (2016) Minor Planet Bull. 43, 5-6.]
geometric albedo albedo 0.046   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.695   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.97 deg.
U-B UB 0.312   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.97 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1794 Finsen (1970 GA)          Discovered 1970-Apr-07 by Bruwer, J. A. at Hartbeespoort
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1970 GA = 1937 JR = 1948 GK = 1950 TJ = 1950 TS2 = 1951 XL = 1951 YJ = 1962 WX = 1965 MC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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