Searching for Vulcanoids is hard
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Objects in the Vulcanoid Zone always stay close to Sun
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Vulcanoid Zone is within 10.5 degrees of Sun as seen from Earth
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Must look for small dark faint bodies next to bright Sun
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Space scopes like Hubble cannot image close to the Sun
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Solar telescopes cannot see faint objects
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Mag +8.0 is ~83 000 000 000 000 fainter than surface of Sun!
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Comparable to contrast ratio of imaging planets around near-by star
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Mag +8.0 is ~1 585 000 000 fainter than the inner corona
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Hard even during an Eclipse