Extreme outer solar system objects have possible origins beyond the Kuiper Belt edge, high inclinations, very large semimajor axes, or large perihelion distances. Thirty-three such objects were observed in this work to determine their optical colors. All three objects that have been dynamically linked to the inner Oort Cloud by various authors ((90377) Sedna, 2006 SQ372, and (87269) 2000 OO67) were found to have ultra-red surface material (spectral gradient, S ~ 25). Ultra-red material is generally associated with rich organics and the low inclination "cold" classical Kuiper Belt objects (KBOs). The observations detailed here show that very red material may be a more general feature for objects kept far from the Sun. The recently discovered retrograde outer solar system objects (2008 KV42 and 2008 YB3) and the high inclination object (127546) 2002 XU93 show only moderately red surfaces (S ~ 9) very similar to known comets, suspected dead comets, Jupiter and Neptune Trojans, irregular satellites, D-type asteroids, and damocloids. The extended or detached disk objects, which have large perihelion distances and are thus considered to be detached from the influence of the giant planets but yet have large eccentricities, are found to have mostly moderately red colors (10 S 18). The colors of the detached disk objects, including the dynamically unusual 2004 XR190 and (148209) 2000 CR105, are similar to the scattered disk and Plutino populations. Thus the detached disk, scattered disk, Plutino, and high inclination "hot" classical objects likely have a similar mix of objects from the same source regions. Outer classical KBOs, including (48639) 1995 TL8, were found to have very red surfaces (18 S 30). The low inclination "cold" classical KBOs, outer classical KBOs and possibly the inner Oort Cloud appear to be dominated by ultra-red objects (S 25) and thus do not likely have a similar mix of objects as the other outer solar system reservoirs such as the scattered disk, detached disk, and Trojan populations. A possible trend was found for the detached disk and outer classical Kuiper Belt in that objects with smaller eccentricities have redder surfaces irrespective of inclinations or perihelion distances. There is also a clear trend that objects more distant appear redder.
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机译：极端的太阳系外物体可能起源于柯伊伯带边缘，高倾角，很大的半长轴或很大的近日点距。在这项工作中观察到了33个这样的物体，以确定它们的光学颜色。发现所有三个由不同作者动态地链接到内部奥尔特云的对象（（90377）Sedna，2006 SQ372和（87269）2000 OO67）都具有超红色表面材料（光谱梯度，S〜25）。超红色材料通常与丰富的有机物和低倾角的“冷”经典柯伊伯带天体（KBO）有关。此处详细观察到的结果表明，对于远离太阳的物体，非常红色的物质可能是更一般的特征。最近发现的逆行外太阳系天体（2008 KV42和2008 YB3）和高倾角天体（127546）2002 XU93仅显示中等程度的红色表面（S〜9），与已知彗星，疑似死彗星，木星和海王星特洛伊木马非常相似，不规则卫星，D型小行星和类水生物。发现具有较大近日点距离并因此被认为已脱离巨型行星的影响但具有较大偏心率的伸展或脱离的圆盘物体，其颜色大多为中等红色（10 S 18）。分离的磁盘对象的颜色，包括动态异常2004 XR190和（148209）2000 CR105，与分散的磁盘和Plutino种群相似。因此，分离的磁盘，分散的磁盘，Plutino和高倾斜度的“热”经典对象可能具有来自相同源区域的对象的相似混合。外部经典KBO（包括（48639）1995 TL8）被发现具有非常红色的表面（18 S 30）。低倾角的“冷”经典KBO，外部经典KBO以及可能的内部奥尔特云似乎被超红色物体所占据（S 25），因此不可能像其他外部太阳系水库那样具有类似的物体混合作为分散的磁盘，分离的磁盘和特洛伊木马程序。对于分离的磁盘和外部的经典柯伊伯带，发现了一种可能的趋势，即偏心较小的物体的表面变红，而与倾斜或近日点距离无关。还有一个明显的趋势，就是距离越远的物体看起来越红。
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