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Post Info TOPIC: Asteroid 3753 Cruithne (1986 TO)


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Asteroid 3753 Cruithne
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Asteroid (3753) Cruithne (1986 TO) makes its closest approach to the Earth (0.480 AU) on the 3rd November 2014

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     Mag
2014 11 01    09 54 31.4 -24 55 59   0.4809  0.8907    63.7    87.4    16.8
2014 11 02    10 02 55.1 -25 00 08   0.4804  0.8810    62.6    88.5    16.9
2014 11 03    10 11 23.5 -25 02 33   0.4803  0.8712    61.4    89.6    16.9
2014 11 04    10 19 56.0 -25 03 13   0.4806  0.8613    60.3    90.8    16.9
2014 11 05    10 28 31.7 -25 02 06   0.4813  0.8514    59.1    91.9    16.9
2014 11 06    10 37 09.8 -24 59 12   0.4824  0.8414    57.9    93.0    16.9
2014 11 07    10 45 49.8 -24 54 31   0.4840  0.8313    56.8    94.1    17.0
2014 11 08    10 54 30.6 -24 48 04   0.4860  0.8212    55.6    95.1    17.0
2014 11 09    11 03 11.6 -24 39 53   0.4884  0.8111    54.5    96.2    17.0
2014 11 10    11 11 51.9 -24 30 02   0.4913  0.8009    53.4    97.2    17.1
2014 11 11    11 20 30.8 -24 18 33   0.4947  0.7907    52.2    98.1    17.1
2014 11 12    11 29 07.6 -24 05 32   0.4985  0.7804    51.1    99.1    17.1
2014 11 13    11 37 41.5 -23 51 02   0.5028  0.7701    50.0    99.9    17.2
2014 11 14    11 46 12.0 -23 35 11   0.5076  0.7598    49.0   100.8    17.2
2014 11 15    11 54 38.4 -23 18 04   0.5129  0.7495    47.9   101.5    17.2
2014 11 16    12 03 00.2 -22 59 49   0.5186  0.7392    46.9   102.3    17.3
2014 11 17    12 11 17.0 -22 40 31   0.5249  0.7288    45.9   102.9    17.3
2014 11 18    12 19 28.3 -22 20 19   0.5317  0.7185    45.0   103.5    17.3
2014 11 19    12 27 33.8 -21 59 21   0.5390  0.7082    44.0   104.0    17.3
2014 11 20    12 35 33.3 -21 37 43   0.5468  0.6979    43.1   104.5    17.4
2014 11 21    12 43 26.6 -21 15 35   0.5552  0.6876    42.3   104.8    17.4
2014 11 22    12 51 13.5 -20 53 03   0.5640  0.6773    41.5   105.1    17.4
2014 11 23    12 58 54.1 -20 30 17   0.5734  0.6672    40.7   105.3    17.4
2014 11 24    13 06 28.1 -20 07 22   0.5833  0.6570    39.9   105.4    17.4
2014 11 25    13 13 55.9 -19 44 27   0.5937  0.6470    39.2   105.4    17.4
2014 11 26    13 21 17.3 -19 21 38   0.6047  0.6371    38.5   105.3    17.4
2014 11 27    13 28 32.7 -18 59 04   0.6162  0.6272    37.9   105.1    17.4
2014 11 28    13 35 42.1 -18 36 49   0.6282  0.6175    37.2   104.8    17.4
2014 11 29    13 42 45.8 -18 15 01   0.6407  0.6080    36.7   104.3    17.4
2014 11 30    13 49 44.1 -17 53 45   0.6538  0.5986    36.1   103.8    17.4


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Asteroid (3753) Cruithne makes its closest approach to the Earth (0.465 AU) on the 3rd November 2013.

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     Mag
2013 11 01    09 49 13.7 -26 36 14   0.4668  0.9004    64.9    87.0    16.8
2013 11 02    09 57 45.5 -26 41 38   0.4660  0.8907    63.8    88.2    16.8
2013 11 03    10 06 22.7 -26 45 09   0.4656  0.8809    62.6    89.4    16.8
2013 11 04    10 15 04.5 -26 46 46   0.4655  0.8711    61.4    90.6    16.8
2013 11 05    10 23 50.2 -26 46 25   0.4659  0.8613    60.2    91.7    16.9
2013 11 06    10 32 38.9 -26 44 06   0.4666  0.8513    59.1    92.9    16.9
2013 11 07    10 41 29.8 -26 39 49   0.4678  0.8414    57.9    94.0    16.9
2013 11 08    10 50 22.0 -26 33 33   0.4694  0.8313    56.7    95.2    17.0
2013 11 09    10 59 14.6 -26 25 20   0.4714  0.8212    55.5    96.3    17.0
2013 11 10    11 08 06.7 -26 15 14   0.4739  0.8111    54.3    97.3    17.0
2013 11 11    11 16 57.6 -26 03 16   0.4769  0.8009    53.2    98.4    17.1
2013 11 12    11 25 46.3 -25 49 32   0.4803  0.7907    52.0    99.4    17.1
2013 11 13    11 34 32.1 -25 34 07   0.4842  0.7804    50.9   100.4    17.1
2013 11 14    11 43 14.3 -25 17 07   0.4885  0.7701    49.8   101.3    17.2
2013 11 15    11 51 52.1 -24 58 38   0.4934  0.7598    48.7   102.1    17.2
2013 11 16    12 00 25.1 -24 38 48   0.4987  0.7495    47.6   102.9    17.2
2013 11 17    12 08 52.6 -24 17 45   0.5046  0.7392    46.6   103.7    17.3
2013 11 18    12 17 14.2 -23 55 38   0.5110  0.7288    45.6   104.4    17.3
2013 11 19    12 25 29.6 -23 32 33   0.5178  0.7185    44.6   105.0    17.3
2013 11 20    12 33 38.4 -23 08 41   0.5252  0.7082    43.7   105.5    17.4
2013 11 21    12 41 40.4 -22 44 10   0.5331  0.6979    42.8   106.0    17.4
2013 11 22    12 49 35.4 -22 19 09   0.5415  0.6876    41.9   106.3    17.4
2013 11 23    12 57 23.3 -21 53 46   0.5505  0.6774    41.1   106.6    17.4
2013 11 24    13 05 04.3 -21 28 10   0.5599  0.6672    40.3   106.8    17.4
2013 11 25    13 12 38.1 -21 02 29   0.5699  0.6571    39.6   106.9    17.5
2013 11 26    13 20 05.1 -20 36 51   0.5805  0.6470    38.8   106.9    17.5
2013 11 27    13 27 25.3 -20 11 24   0.5915  0.6371    38.2   106.8    17.5
2013 11 28    13 34 38.9 -19 46 15   0.6031  0.6273    37.5   106.6    17.5
2013 11 29    13 41 46.1 -19 21 30   0.6152  0.6176    36.9   106.3    17.5
2013 11 30    13 48 47.3 -18 57 17   0.6279  0.6080    36.4   105.9    17.4


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Asteroid 3753 Cruithne makes its closest approach to the Earth (0.450 AU) on the 4th November, 2012 

Google earth file: Asteroid (3753) Cruithne.kmz (17kb, kmz)



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Google earth file: Asteroid 3753 Cruithne (1986 TO).kmz (18kb, kmz)



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Asteroid 3753 Cruithne makes its closest approach to the Earth (0.435 AU) on the 7th November, 2011.



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Google earth file: Asteroid (3753) Cruithne.kmz (18kb, kmz)

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2011 09 06    04 54 28.0 -08 20 23   0.8454  1.3336    91.6    49.1    17.7
2011 09 07    04 57 21.7 -08 36 54   0.8354  1.3286    91.7    49.3    17.7
2011 09 20    05 38 07.1 -12 47 58   0.7108  1.2559    92.5    53.0    17.3
2011 09 30    06 15 08.2 -16 48 02   0.6236  1.1911    91.2    57.2    17.0
2011 10 10    07 00 10.5 -21 21 39   0.5473  1.1183    87.6    63.2    16.8
2011 10 20    07 57 35.8 -26 02 09   0.4860  1.0373    81.0    71.5    16.6
2011 10 30    09 11 41.9 -29 42 40   0.4462  0.9483    71.2    82.4    16.6
2011 10 31    09 20 03.9 -29 57 16   0.4437  0.9390    70.0    83.6    16.6
2011 11 01    09 28 35.3 -30 10 00   0.4416  0.9296    68.9    84.9    16.6
2011 11 02    09 37 15.4 -30 20 47   0.4397  0.9201    67.7    86.1    16.7


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3753 Cruithne is an asteroid in orbit around the Sun in 1:1 orbital resonance with that of the Earth. It is a periodic inclusion planetoid orbiting the Sun in an apparent horseshoe orbit. It has been called "Earth's second moon", although it is only a quasi-satellite.

Source

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Earth has a second moon, of sorts, and could have many others, according to three astronomers who did calculations to describe orbital motions at gravitational balance points in space that temporarily pull asteroids into bizarre orbits near our planet.
Cruithne shares Earth's orbit, but does not actually orbit the Earth.
The 5-km satellite, which takes 770 years to complete a horseshoe-shaped orbit around Earth, is called Cruithne and will remain in a suspended state around Earth for at least 5,000 years. Every 385 years, it comes to its closest point to Earth, some 15 million kilometres away. Its next close approach to Earth comes in 2285.

3753 Cruithne
Orbital characteristics
Orbit type Near-Earth
Semimajor axis 0.99778 AU
Eccentricity 0.514784
Orbital period 365d 6h
Inclination 19.8122°
Physical characteristics
Diameter 5 km
Mass ? kg
Density ? g/cm3
Rotation period ?
Spectral class ?
Albedo ?
History
Discoverer various, 1986

Cruithne, discovered in 1986, and then found in 1997 to have a highly eccentric orbit, cannot be seen by the naked eye. It is named after a Celtic tribe...

They were first Celtic racio-tribal group to come to the British Isles, appearing between about 800 and 500 B.C., and coming from the European continent. They were also known as the Picts. The correct pronunciation for 'Cruithne' is 'croo-een-ya'...


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Orbital Elements at Epoch 2454800.5 (2008-Nov-30.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5148364550523318 5.6926e-07  
a .9976821472548191 2.9193e-09 AU
q .4840390072931496 5.681e-07 AU
i 19.81083044915119 1.7794e-05 deg
node 126.2845908527698 0.00012043 deg
peri 43.74284252086552 0.00011088 deg
M 332.5779276504738 4.5612e-05 deg
tp 2454828.225826410681
(2008-Dec-27.72582642)
4.6132e-05 JED
period 363.9877169245995
1.00
1.5976e-06
4.374e-09
d
yr
n .98904436402884 4.341e-09 deg/d
Q 1.511325287216488 4.4222e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      471  
   data-arc span      12792 days (35.02 yr)  
   first obs. used      1973-10-17  
   last obs. used      2008-10-25  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   quality code      0  
   fit RMS      .58294  
   data source      ORB  
   producer      Otto Matic  
   solution date      2008-Oct-30 00:50:40  

Additional Information
 Earth MOID = .0709407 AU 
 T_jup = 5.922 

Source

-- Edited by Blobrana at 21:10, 2009-01-26

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