The OSIRIS-REx Visible and Infrared Spectrometer (OVIRS) is a point spectrometer covering the spectral range of 0.4 to 4.3 microns (25,000–2300 cm−1). Its primary purpose is to map the surface composition of the asteroid Bennu, the target asteroid of the OSIRIS-REx asteroid sample return mission. The information it returns will help guide the selection of the sample site. It will also provide global context for the sample and high spatial resolution spectra that can be related to spatially unresolved terrestrial observations of asteroids. It is a compact, low-mass (17.8 kg), power efficient (8.8 W average), and robust instrument with the sensitivity needed to detect a 5% spectral absorption feature on a very dark surface (3% reflectance) in the inner solar system (0.89–1.35 AU). It, in combination with the other instruments on the OSIRIS-REx Mission, will provide an unprecedented view of an asteroid’s surface.

中文翻译：

---

OSIRIS-REx 可见光和红外光谱仪 (OVIRS)：小行星 Bennu 的光谱图

OSIRIS-REx 可见光和红外光谱仪 (OVIRS) 是一种点光谱仪，其光谱范围为 0.4 至 4.3 微米（25,000–2300 cm-1）。它的主要目的是绘制小行星 Bennu 的表面成分图，这是 OSIRIS-REx 小行星样本返回任务的目标小行星。它返回的信息将有助于指导样本站点的选择。它还将为样本和高空间分辨率光谱提供全球背景，这些光谱可能与小行星的空间未分辨陆地观测有关。它是一种紧凑、低质量 (17.8 kg)、节能（平均 8.8 W）且坚固耐用的仪器，具有检测太阳内部非常暗的表面（3% 反射率）上 5% 光谱吸收特征所需的灵敏度系统（0.89–1.35 AU）。它，