Depends on the details of how your time travel theory and technology work. One needs to invent those first, since they don’t exist. What you say seems logical to me, except that it assumes a fixed frame of reference around the sun, which is also zooming through space in an orbit around the center of the galaxy and other masses, so the question is what vector does the traveler’s location follow, and is it affected by gravity and/or physical objects along the time it travels over. If it is not affected by gravity, you’ll re-appear quite a ways away from the planet or solar system you started on, depending on how far you displace in time. If it is affected by gravity but not physical objects, then the position for re-appearance would fall below the planet’s surface, and you’d tend to re-emerge inside the planet (unless it started in a stable orbit, so all time travel would want to start out in an orbit or outer space). If the position is affected by physical objects, then you could leave and return on a planetary surface, but the question then would be what exists in that location while you are shifting time – is something present there, and what happens if it’s disturbed. If nothing is present there, what happens if someone places something in the space you occupied when you left, (or before you got there, if moving back through time).
Personally, I don’t think reverse time travel makes much sense… unless there are infinite variations of history that exist in an infinite continuum… which might be the case… but that’s another topic.