# Astronomy (ASTR) — Summer 2026 schedule

Rio Hondo College · 5 sections · Seat counts as of 2026-10-18

Source: https://prod-ssb9-registration.riohondo.edu:8443/StudentRegistrationSsb/ssb/term/termSelection?mode=search

Term dates: Jun 1, 2026 – Aug 7, 2026 (from the sections' dates) · 7 sessions, with dates: /c/rio-hondo-college/schedule/summer-2026/index.json · Academic calendar: https://www.riohondo.edu/academics/calendar/

Course descriptions: 2026-2027 catalog, /c/rio-hondo-college/catalog/2026-2027/courses/astr.md

## ASTR 110 — General Astronomy (3 units)

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 51739 | 0 | In person, DH Daily Census | Mon/Tue/Wed/Thu 8:00–10:25am, Science 236 | Jun 1–Jul 2 | Joseph Rhee | 56 of 72 open |
| 53370 | 0 | Online anytime, UA Independent Study Daily | Online, no set time | Jun 15–Jul 24 | Joseph Rhee | 22 of 72 open |
| 53752 | 0 | Online anytime, UA Independent Study Daily | Online, no set time | Jun 15–Jul 23 | Joseph Rhee | 50 of 72 open |

## ASTR 112 — Observational Astronomy (1 units)

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 51740 | 01 | In person, DH Daily Census | Mon/Tue/Wed/Thu 11:00am–1:25pm, Science 230 | Jun 1–Jul 2 | Joseph Rhee | 3 of 24 open |
| 52177 | 02 | In person, DH Daily Census | Mon/Tue/Wed/Thu 11:00am–1:25pm, Science 230 | Jul 6–Aug 7 | Gary Poon | 15 of 24 open |