Archive for January, 2011

(Russian) BP28A01 недавно открытый “грек” Юпитера

(Russian) Очередные находки нашего обзора

Recovery of a very interesting asteroid (2004 CK39 = BO04B01)

This time there was no discovery, but the observations proved exceedingly useful! The recovery of a very interesting object – the near Earth asteroid 2004 CK39 was last observed March 21, 2004. This became known after obtaining supplementary astrometry of the object BO04B01 from the Astrotel-Caucasus Observatory (Timur Kryachko).

The observation arc up to the moment of recovery consisted of 5 weeks. The object was discovered by the professional Catalina Sky Survey on Valentine’s Day. The period of revolution of the asteroid around the Sun is 3.48 years, so this object was not found on its last approach to the Earth.

NEO 2004 CK39, as stated earlier, belongs to the Apollo family. But this is a very unusual asteroid – its orbital eccentricity is e=0.829, and it more closely resembles a comet! Moreover, at perihelion (q=0.3931 a.u.) it goes inside the orbit of Mercury. It regularly passes several hundredths of an astronomical unit from the planet!

A more detailed analysis of the evolution of the orbit of this interesting asteroid will be presented later. Stay tuned for more news!

Circular about the recovery:

M.P.E.C. 2011-B65                                Issued 2011 Jan. 29, 21:58 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC@CFA.HARVARD.EDU
       URL http://www.minorplanetcenter.org/iau/mpc.html  ISSN 1523-6714

                                   2004 CK39

                           Revision to MPEC 2004-C63

Additional Observations:
     K04C39K  C2011 01 29.20951 10 04 27.17 +35 19 16.5          19.4 RoEB065H15
     K04C39K  C2011 01 29.22423 10 04 25.13 +35 19 38.9          19.7 RoEB065H15
     K04C39K  C2011 01 29.23886 10 04 23.10 +35 20 01.1          19.4 RoEB065H15
     K04C39K  C2011 01 29.25388 10 04 21.01 +35 20 24.0          19.4 RoEB065H15
     K04C39K  C2011 01 29.85477 10 02 58.38 +35 35 12.6          20.0 RrEB065114
     K04C39K  C2011 01 29.85856 10 02 57.86 +35 35 18.8          19.8 RrEB065114
     K04C39K  C2011 01 29.86639 10 02 56.85 +35 35 31.4          19.6 RrEB065114
     K04C39K  C2011 01 29.87030 10 02 56.23 +35 35 38.9          19.8 RrEB065114

Observer details:
114 Engelhardt Observatory, Zelenchukskaya Station.  Observers T. Kryachko,
    B. Satovski.  Measurer T. Kryachko.  0.3-m f/7.7 reflector + CCD.
H15 ISON-NM Observatory, Mayhill.  Observer L. Elenin.  0.45-m f/2.8
    astrograph + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
110129 H15 0.58+ 0.16-    110129 114 0.58+ 0.16-    MPO 62494   -0.68 day

Orbital elements:
2004 CK39                                                Earth MOID = 0.0542 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M 338.06143              (2000.0)            P               Q
n   0.28292730     Peri.  265.29131     -0.09265311     +0.99569579
a   2.2980148      Node   359.37826     -0.80858458     -0.07659065
e   0.8289199      Incl.   12.24970     -0.58103905     -0.05218977
P   3.48           H   19.2           G   0.15           U   5
Residuals in seconds of arc
040214 703  0.0   0.6-    040216 246  1.1-  0.7+    040308 J95  1.1+  0.9-
040214 703  0.9-  0.1+    040216 246  0.4-  0.3+    040310 448  1.1-  0.8+
040214 703  0.3-  0.2-    040217 493  0.2-  0.2+    040310 448  1.6-  0.1+
040214 703  0.9-  0.4+    040217 493  0.4-  0.2+    040310 448  0.3-  0.0
040214 673 (2.5+  0.4-)   040217 246  0.3+  0.5+    040310 926  0.2-  0.6+
040214 673  1.9+  0.4-    040217 246  0.7+  0.1+    040310 926  1.0-  0.3+
040214 673  1.7+  0.1+    040217 246  0.1+  0.1+    040310 926  0.9-  0.8+
040214 673  1.1+  0.3+    040217 246  0.4+  0.2-    040317 448  0.0   0.5+
040214 854  0.3+  0.2+    040217 246  0.3+  0.5+    040317 448  0.3-  0.6+
040214 854  0.5+  0.0     040218 448  0.2+  0.2-    040317 448  0.2-  0.3+
040214 854  0.7+  0.6+    040218 448  0.4-  0.2-    040319 J87  0.7-  1.9+
040215 H36  0.3-  0.3-    040218 448  0.0   0.3-    040319 J87  1.5+  0.6+
040215 H36  0.5-  0.4-    040223 J95  0.2+  0.1+    040319 J87  0.7+  0.8+
040215 H36  0.6-  0.3-    040223 J95  0.1+  0.3+    040321 H36 (2.2-  3.0+)
040215 926  0.9+  1.0+    040224 J95  0.2-  0.4-    040321 H36  1.6-  0.6-
040215 926  0.7-  0.2-    040227 448  0.1+  0.0     110129 H15  0.2+  0.3+
040215 926  0.1+  0.6+    040227 448  0.3-  0.1+    110129 H15  0.1+  0.6+
040215 587  1.2-  1.5-    040227 448  0.3-  0.1-    110129 H15  0.0   0.8+
040215 587  0.1+  0.7+    040305 540  0.1-  0.5+    110129 H15  0.1-  1.1+
040216 649  0.4-  0.2-    040305 540  0.3+  0.5-    110129 114  0.9-  2.0-
040216 649  0.7+  0.7+    040306 448  0.1-  0.0     110129 114  0.6-  1.5-
040216 649  0.1-  0.6-    040306 448  0.1+  0.3+    110129 114  0.9+  0.8-
040216 246  1.3-  0.6+    040306 448  0.3-  1.0+    110129 114  0.2+  0.8+
040216 246  0.2-  0.7+    040308 J95  0.2+  1.2-

Ephemeris:
2004 CK39                a,e,i = 2.30, 0.83, 12                  q = 0.3931
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2010 12 30    10 27 05.9 +27 22 44   1.2057  1.9684   127.8    23.2    22.2
...
2011 01 14    10 24 30.6 +30 17 28   0.9189  1.8004   142.3    19.5    21.3
...
2011 01 22    10 17 00.3 +32 38 25   0.7816  1.7059   149.9    16.8    20.7
...
2011 01 28    10 07 02.0 +34 50 00   0.6874  1.6326   154.6    15.0    20.3
2011 01 29    10 04 54.4 +35 14 09   0.6725  1.6201   155.2    14.8    20.2
2011 01 30    10 02 37.7 +35 38 54   0.6579  1.6076   155.7    14.6    20.1
...
2011 02 05    09 45 17.2 +38 19 01   0.5754  1.5313   156.7    14.8    19.8
...
2011 02 13    09 09 32.3 +42 09 11   0.4811  1.4257   150.5    20.0    19.4
...
2011 02 28    07 08 49.1 +46 23 21   0.3604  1.2150   120.8    44.5    19.1

Timothy B. Spahr             (C) Copyright 2011 MPC           M.P.E.C. 2011-B65

Possible discovery of our second near-Earth asteroid

20 minutes ago, in the course of a regular sky survey, a potential new asteroid approaching the Earth was discovered. The object BO04B01 was placed on the NEOCP comfirmation page. The preliminary orbit says it might be a member of the Apollo family. To be continued…

Stardust approaches its next target

NASA/JPL-Caltech

January 18 and 19, the first pictures taken by the spacecraft Stardust of its mission to return to the nucleus of Comet Tempel 1 were received. The pictures were taken by the spacecraft’s navigation camera from a distance of 26.3 and 25.4 million km. In two weeks, February 14th, the spacecraft will pass 200 km from the nucleus of the comet with the goal of photographing the results of the bombardment in July of 2005 by another spacecraft, Deep Impact.

At the time of the flyby it is planned to take 72 detailed photographs of the surface of the comet and compare them with the pictures from 5.5 years ago. An analysis of the results of the crash of the impactor into the nucleus of the comet will allow us to better understand where and of what the comets of the Jupiter family formed, as well as the physical-mechanical properties of their surfaces.

The encounter of the spacecraft and comet will take place 337 million km from Earth.

January 2011
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