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2014年03月20日,163号小行星掩轩辕十四

[複製連結]
發表於 2014-3-3 14:35:57 | 顯示全部樓層 |閱讀模式
本帖最後由 昴星团 於 2014-3-3 14:39 編輯

北美洲地区可见,不知那边的天文同好是否做好准备了呢?
期待那边的观测报告!

0320_163_32317_MapNA.gif

http://asteroidoccultation.com/2014_03/0320_163_32317.htm

                      IOTA/IOTA-ES occultation update for
            (163) Erigone / HIP 49669 event on 2014 Mar 20, 06:07 UT
                          Visible from NE USA, E Canada


Summary
-------
On 2014 Mar 20 UT, the 72 km diameter asteroid (163) Erigone will occult a 1.3
mag star in the constellation Leo for observers along a path across NE USA, E
Canada.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 11.1 mag to 12.4 mag (the magnitude of the asteroid) for at most
14.3 seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly
provided by Hugh Harris, TMO astrometry for the asteroid kindly provided by Bill
Owen, historical astrometry from the MPC files (via AstDys), and the following
catalogs for the star position: .

The event at a glimpse
----------------------
    * Rank: 99
    * date and approx. time of event: 2014 Mar 20, 05:53  - 2014 Mar 20, 06:20  UT
    * geocentric midpoint of event [JD]: 2456736.75520833
    * magnitude of target star: 1.3
    * magnitude drop [mag]: 11.1
    * estimated maximum duration [ s ]: 14.3
    * Moon: 87 % sunlit, 72° distance
    * Sun: 150° distance
    * rough path description: NE USA, E Canada

Additional comments
-------------------
wide double star

The occultation path
--------------------
    * approximate projected width [km]: 107
    * 1 sigma uncertainty interval [path widths]: +/- 0.16
    * 1 sigma uncertainty interval [seconds]: +/- 3.3
    * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .021 +/- .012)
    * 1 sigma uncertainty ellipse (major, minor, PA): ( .022", .011", 104° )
    * approx speed of asteroid's shadow [km/s]: 5.0907
    * website for maps:
          http://www.asteroidoccultation.com

Path Coordinates:略

Data for the target star
------------------------
* name: HIP 49669
* constellation : Leo
* J2000 position with proper motion  to date of event [h,m,s ; °,',"]
        RA: 10 08 22.0688  DE: +11 58 02.038
* position source: mpos:HIP2 pm:HIP2 plx:HIP2
* standard error: RA,DE ["]: ( .008, .005 )
* V mag [mag]: 1.3
* B mag [mag]: 1.3
* Apparent position with proper motion
        RA(deg): 152.2886303791  DE(deg): 11.8936783154
* Equation of equinoxes (radians) : 0.000038934518563
* Diameter [mas]: 1
* remarks:October 2005 - used HIP position

Data for the minor planet
-------------------------
* general information:
     (number) name: (163) Erigone
     approx. diameter [km]: 72
     approx. diameter ["]: .084
     distance from Earth [AU]: 1.18500

* orbital information:
      orbit source: Preston
      date of fit: 2014 Feb 24
      source of used astrometry: FASTT TMO MPC (via Astdys)
      number of used observations: 1393
      number of rejected observations: 99
      time covered by the observations: 1903 Sep 23 - 2014 Feb 20
      1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.010, 106°
      remarks:

* orbital elements for (163) Erigone :
      Mean anomaly       =  46.28782040 deg
      Arg. of pericenter = 298.23786809 deg
      Long. of node      = 160.17364864 deg
      Inclination        =   4.81452356 deg
      Eccentricity       =   0.19116014
      Semimajor axis     =   2.36690097 AU
      Perihelion dist    =   1.91444385 AU
      Mag:             H = 9.41,  G = -0.04
      Epoch of elements  : MJD   56736.25500000 TDT
                           (2014 Mar 20.255)

------ occelmnt file for Occult  BEGIN -----------------------------------
2014 Mar 20
   163 Erigone        
6h  7.5m UT
   1.3   10  8 22.069 11 58  2.04HIP 49669              1.3
12.4     73   14.3   1.185    -1.110     13.72
-117.4852  11.965    90.02   -0.18
  6.1250  0.47203  0.56082 -2.19826  1.85034  0.00246 -0.00097
2000     44.5948032014 314.00000298.237868160.173649  4.8145240.19116014 2.3669010 1.9144438 9.5 5.0-.04
RATE 2.7066620 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000
Meas  0.022 0.011   104  1.16 0.014 0                               1-2-2 056713.0020140320__49669
------ occelmnt file for Occult  END   -----------------------------------

============================================
Calculator (s): Steve Preston
Date of update: 2014 Feb 25, 04:38 UT

Steve Preston
7640 NE 32nd St
Medina, WA 98039
425-688-9965

mailto: stevepr@acm.org
發表於 2014-3-3 22:52:17 | 顯示全部樓層
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