# Astronomy (ASTR) — Spring 2027 schedule

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

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

Term dates: Jan 23, 2027 – May 20, 2027 (from the sections' dates) · 7 sessions, with dates: /c/rio-hondo-college/schedule/spring-2027/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 |
| --- | --- | --- | --- | --- | --- | --- |
| 39220 | 0 | Online anytime, UA Independent Study Weekly | Online, no set time | Jan 23–May 20 | Joseph Rhee | 72 of 72 open |
| 39419 | 0 | Online anytime, UA Independent Study Weekly | Online, no set time | Jan 23–May 20 | Joseph Rhee | 72 of 72 open |
| 30099 | 02 | Online anytime, UA Independent Study Weekly | Online, no set time | Jan 23–May 20 | Joseph Rhee | 72 of 72 open |
| 30109 | 03 | In person, CH Weekly Census | Tue 11:10am–12:35pm, Science 236; Thu 11:10am–12:35pm, Science 236 | Jan 23–May 20 | Joseph Rhee | 72 of 72 open |
| 35499 | 04 | In person, CH Weekly Census | Tue/Thu 8:00–9:25am, Science 236 | Jan 23–May 20 | Joseph Rhee | 62 of 62 open |
| 35503 | 05 | In person, CH Weekly Census | Wed/Thu 8:35–10:00am, El Rancho High School | Jan 23–May 20 | To Be Assigned | 72 of 72 open |

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

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 35505 | 01 | In person, CH Weekly Census | Tue/Thu 8:00–9:25am, Science 236 | Jan 23–May 20 | Joseph Rhee | 10 of 10 open |

## ASTR 112 — Observational Astronomy (1 units)

| CRN | Section | Format | Meets | Dates | Instructor | Seats |
| --- | --- | --- | --- | --- | --- | --- |
| 37552 | 0 | In person, CH Weekly Census | Wed 12:45–1:35pm, Science 230; Wed 1:45–3:55pm, Science 230 | Jan 23–May 20 | Gary Poon | 24 of 24 open |
| 35020 | 01 | In person, CH Weekly Census | Thu 12:45–3:55pm, Science 230 | Jan 23–May 20 | Joseph Rhee | 24 of 24 open |
| 35021 | 02 | In person, CH Weekly Census | Tue 12:45–3:55pm, Science 230 | Jan 23–May 20 | Joseph Rhee | 24 of 24 open |