Earth is a planet, but doesn't come up much in astrology. John Lash calls this a "terrestrial blindspot" in his groundbreaking book Quest for the Zodiac. He says the key markers of destiny are found in the Sun and Earth's position in the actual constellations (not the signs).
This is not sidereal astrology since it's not going one sign (or 26 degrees) back. It's Star (or Stellar) Zodiac, from his research on placing planets in the constellations.
