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CME Observation during the Total Solar Eclipse on November 14, 2012 ( 2))
Osamu OHGOE
Amateur Astronomer -- Tokyo Japan; sol-eclipse.ohgoe@nifty.com(2013.06.13)
ABSTRACTDuring the total solar eclipse on November 14, 2012 the white-light corona was observed in thenorthern Australia and Pacific Ocean.

I took many frames of white-light corona on the ship "PacificVenus" cruising about 500 km north from New Zealand. In the frames I took, the CME can be discerned
but in frames taken at Australia, 35 minutes before, there is no image of CME.

Then, I concluded

transverse velocity of the CME was 220~580km/s and the transverse acceleration was 2.5~3.7 km/s2 .

1. Introduction
In order to measure coronal motions, multi point observations of total solar eclipse had planed
many times. For example, members of Tokyo University of Science Astronomical Club observed thetotal solar eclipse on February 16, 1980 in Kenya and India. The time difference between two sites isabout 110 minutes. They caught movement of two loops and one small streamer of corona.

Thetransverse velocity of each was about 20km/s, 7~8km/s and 23km/s [1]( see Figure 1). Generally, thevelocity of the change of the coronal structures is small. In order to catch them, we need twoobservation sites having some time difference.

Figure 1

Movement of structures of the corona on 1980 February 16

There is a fast-moving phenomenon in the corona like a CME ( coronal mass ejection). It is not
unusual to occur some CMEs during a total solar eclipse [2]( see Figure 2). But it is very rare that wecan see the motion of the CME at one observation site.

2. Basic Information on the 2012 November 14 eclipse observation
The path of totality stretched from northern Australia to the Pacific Ocean.

In the Pacific Ocean

-2-Figure 2 Computer-processed imageof the corona taken by Osamu
OHGOE, 2010 July 11 at HAO atoll,
French Polynesia.

the Moon's shadow made nolandfall. Our ship "Pacific Venus"
left Noumea of New Caledonia
on Nov. 12 for Auckland in New
Zealand.

When we caught thetotal solar eclipse on the way,
the location of the ship was
173°04′32″E~173°04′23″E

and30°02′04″S ~ 30°02′02″S [3].

Figure 3 The location of our ship during the total solar eclipse, GPS Data provided by Jun Nakazawa

I observed the eclipse with one telescope 100mm in diameter and 512mm in a focal length, andtook 209 frames of the corona.

With 33 frames among them, I got 5 images of the fine structure of

the white-light corona processed by Shiota's method [4].

3. Movement of the CME
Figure 4~6 illustrates image A, C and E.

Each image was taken at 21:14:11 UT, 21:15:08 UT and21:16:12 UT. I chose 3 points in the front of the CME and Figure 7 illustrate them. The radius of the-3-Figure 4 Image A (top left)
Figure 5 Image C (top right)

Figure 7 Choice 3 points
in the front of the CME

Figure 6 Image E (bottom)

Sun is 6.960 × 10 5 km. The semi diameter of the Sun is 969 seconds of arc. The semi diameter ofthe Moon is 1017 seconds of arc.
The provisional values of transverse velocity and acceleration of the CME ware calculated as follows.
I used three images for a calculation.
Image No.6229

21:14:13(UT)

1/250 second exposure

Image No.6277

21:15:08(UT)

1/250 second exposure

Image No.6329

21:16:13(UT)

1/250 second exposure

-4-transverse velocity

Point 1transverse acceleration

No.6229(3.7±0.3) X102 km/s
3.2±0.8 km/s2

No.6277(5.7±0.2) X102 km/s
No.6329transverse velocity

Point 2transverse acceleration

No.6229(2.2±0.3) X102 km/s
2.5±0.8 km/s2

No.6277(3.7±0.2) X102 km/s
No.6329transverse velocity

Point 3transverse acceleration

No.6229(3.5±0.3) X102 km/s
3.7±0.8 km/s2

No.6277(5.8±0.2) X102 km/s
No.6329

These speed is the ingredient which is perpendicular to the line of sight.

This value seems to bea proper value for the speed of CME even if I take the factor into account.
I think that the sharpening of the image and improvement of the time resolution are important by
the future observation.

REFERENCES[1] Ohoge, O. ,et al. 1980, Proceedings of The annual meeting of Astronomical Society of Japan in 1980
autumn (Japanese)[2] Ohgoe, O. ,et al. 2010, Reports of the Total Solar Eclipse 2010 July 11 at French Polynesia ~ DVD(Japanese)[3] Ohgoe, O. ,et al. 2013, Reports of the Total Solar Eclipse 2012 November 14 ~ DVD ( Japanese)[4] Ohgoe, O. , Shiota, K. , 2012, Chasing Shadows: An Observer's Guide to Solar Eclipses ( Japanese),
Seibundo Shin Kousha