2014年03月20日，163号小行星掩轩辕十四
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！
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, 06:20UT
* geocentric midpoint of event : 2456736.75520833
* magnitude of target star: 1.3
* magnitude drop : 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 : 107
* 1 sigma uncertainty interval : +/- 0.16
* 1 sigma uncertainty interval : +/- 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 : 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 motionto date of event
RA: 10 08 22.0688DE: +11 58 02.038
* position source: mpos:HIP2 pm:HIP2 plx:HIP2
* standard error: RA,DE ["]: ( .008, .005 )
* V mag : 1.3
* B mag : 1.3
* Apparent position with proper motion
RA(deg): 152.2886303791DE(deg): 11.8936783154
* Equation of equinoxes (radians) : 0.000038934518563
* Diameter : 1
* remarks:October 2005 - used HIP position
Data for the minor planet
-------------------------
* general information:
(number) name: (163) Erigone
approx. diameter : 72
approx. diameter ["]: .084
distance from Earth : 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 OccultBEGIN -----------------------------------
2014 Mar 20
163 Erigone
6h7.5m UT
1.3 108 22.069 11 582.04HIP 49669 1.3
12.4 73 14.3 1.185 -1.110 13.72
-117.485211.965 90.02 -0.18
6.12500.472030.56082 -2.198261.850340.00246 -0.00097
2000 44.5948032014 314.00000298.237868160.1736494.8145240.19116014 2.3669010 1.9144438 9.5 5.0-.04
RATE 2.7066620 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000
Meas0.022 0.011 1041.16 0.014 0 1-2-2 056713.0020140320__49669
------ occelmnt file for OccultEND -----------------------------------
============================================
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
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