# Astronomy (ASTR) — Fall 2026 schedule

Rio Hondo College · 11 sections · Seat counts as of 2026-10-18

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

Term dates: Aug 15, 2026 – Dec 5, 2026 (from the sections' dates) · 5 sessions, with dates: /c/rio-hondo-college/schedule/fall-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 |
| --- | --- | --- | --- | --- | --- | --- |
| 77917 | 0 | Online anytime, UA Independent Study Weekly | Online, no set time | Aug 15–Dec 5 | Joseph Rhee | 29 of 72 open, 4 waitlisted |
| 78821 | 0 | Hybrid, UA Independent Study Daily | Thu 3:15–5:20pm, Whittier High School; Plus online work | Aug 31–Dec 5 | Heather Stirewalt | 56 of 72 open |
| 78954 | 0 | Online anytime, UA Independent Study Daily | Online, no set time | Aug 31–Dec 5 | Gary Poon | 59 of 72 open |
| 74191 | 01 | In person, CH Weekly Census | Mon/Wed 8:00–9:25am, Science 236 | Aug 15–Dec 5 | Joseph Rhee | 36 of 62 open |
| 74192 | 02 | Online anytime, UA Independent Study Weekly | Online, no set time | Aug 15–Dec 5 | Joseph Rhee | 21 of 72 open, 2 waitlisted |
| 70467 | 03 | In person, CH Weekly Census | Tue/Thu 8:00–9:25am, Science 236 | Aug 15–Dec 5 | Joseph Rhee | 51 of 72 open |
| 70470 | 05 | In person, CH Weekly Census | Tue/Thu 11:10am–12:35pm, Science 236 | Aug 15–Dec 5 | Joseph Rhee | 32 of 72 open |

## ASTR 110H — General Astronomy Honors (3 units)

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 75948 | 0 | In person, CH Weekly Census | Mon/Wed 8:00–9:25am, Science 236 | Aug 15–Dec 5 | Joseph Rhee | 2 of 10 open |

## ASTR 112 — Observational Astronomy (1 units)

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 74193 | 01 | In person, CH Weekly Census | Tue 12:45–3:55pm, Science 230 | Aug 15–Dec 5 | Joseph Rhee | 2 of 24 open |
| 74194 | 02 | In person, CH Weekly Census | Wed 12:45–3:55pm, Science 230 | Aug 15–Dec 5 | Gary Poon | 10 of 24 open |
| 74195 | 03 | In person, CH Weekly Census | Thu 12:45–3:55pm, Science 230 | Aug 15–Dec 5 | Joseph Rhee | 3 of 24 open |