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首页> 外文期刊>Planetary and space science >Indian Mars-Colour-Camera captures far-side of the Deimos: A rarity among contemporary Mars orbiters
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Indian Mars-Colour-Camera captures far-side of the Deimos: A rarity among contemporary Mars orbiters

机译：印度火星彩色相机捕捉了Deimos的另一端：当代火星轨道飞行器中很少见

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Mars and Deimos are tidally locked so one would always get to view the same side of Deimos from Mars. Most of the contemporary functional satellites orbiting Mars viz. Mars Reconnaissance Orbiter, Mars Express, Mars Odyssey, MAVEN etc. are positioned between Mars and Deimos, hence they always view only one side of Deimos i.e the Mars-side, while the far-side is always looking outward with respect to all these satellites. However the maiden Indian Mars Orbiter Mission (MOM) is an exception as it has a very large elliptical orbit and goes behind the orbit of Deimos. This has enabled MOM to view the far-side of Deimos which has not been viewed for last few decades by any Mars orbiter. Mars Colour Camera (MCC), onboard MOM acquired four image-frames of the Deimos, the farthest of two natural satellites of Mars, on October 14, 2014 at around 13:05 UT. These four images of MCC have been used to generate an High Dynamic Range (HDR) product so as to enhance the image details. The two well-known craters of near-side are missing in this HDR image and the shape of far-side, recently updated and reported models of Deimos proposed by other researchers, matches with the shape of Deimos in MCC images thus confirming that the far-side view of Deimos has been captured by MCC of Mars Orbiter Mission. The magnitude of Deimos has also been computed from this far-side image, which varies by a small margin from the known magnitude of Deimos. This could probably be due to possible difference in the near and far side surface characteristics, which needs further detailed investigation and more imaging of far-side in future. However, there could be reasons other than the physical characteristics of the Deimos. Thus far-side sighting has generated a scientific interest to understand it holistically. This note is a brisk or rapid communication regarding sighting of the far-side of the Deimos by MCC after a long spell of more than three decades by any other Mars mission, including the contemporary operational Mars orbiters. It highlights the imaging capabilities of MCC-MOM and possible research to come in future. (C) 2015 Elsevier Ltd. All rights reserved.
机译：火星和Deimos处于潮汐锁定状态，因此人们总是可以从火星上看到Deimos的同一面。大多数当代功能卫星绕火星即绕轨道飞行。火星侦察轨道飞行器，火星快车，火星奥德赛，MAVEN等位于火星和Deimos之间，因此，他们始终只看到Deimos的一侧，即火星一侧，而相对于所有这些卫星而言，远侧总是向外看。但是，处女座的印度火星轨道飞行器（MOM）是一个例外，因为它具有很大的椭圆形轨道并且位于Deimos的轨道后面。这使MOM可以查看Deimos的远端，这是近几十年来任何火星轨道器都没有看到的。机载MOM上的火星彩色相机（MCC）于2014年10月14日世界标准时间约13:05捕获了Deimos的四个图像帧，这是火星两颗自然卫星中最远的一个。 MCC的这四个图像已用于生成高动态范围（HDR）产品，以增强图像细节。 HDR图像中缺少两个著名的近侧坑口，其他研究人员提出的最近更新和报告的Deimos模型的远侧形状与MCC图像中的Deimos形状匹配，从而证实了火星轨道飞行器的MCC拍摄了Deimos的侧视图。 Deimos的幅度也已从该远侧图像计算得出，与已知的Deimos幅度相差很小。这可能是由于近侧和远侧表面特性可能存在差异，这需要进一步的详细研究和将来对远侧的更多成像。但是，除了Deimos的物理特性外，可能还有其他原因。因此，远距离瞄准已经引起了人们对从整体上理解它的科学兴趣。这份便笺是关于MCC在经历了三十多年的任何其他火星飞行任务（包括现代火星轨道飞行器）经过很长时间之后发现Deimos远端的轻快或快速的交流。它着重介绍了MCC-MOM的成像功能以及未来可能进行的研究。 （C）2015 Elsevier Ltd.保留所有权利。

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