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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 ]

[ show orbit diagram ]
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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