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ASTR 4 · Lec 1

Black Holes and Cosmic Catastrophes

Fall 2026Larkin, J.E.4 units

Seats, time, final and grades

Seats

Closed.

90 of 90 enrolled, lecture and all discussions summed.

Meets

MWF 1:00pm-1:50pm

Lecture only. You also attend a discussion, listed below.

Final

Wed 9 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 12 hours ago.

Grades

3.37
predicted, this instructor · 113 grades

113 letter grades, Larkin, J.E..

Read 71 minutes ago. This is a recent reading, not a live seat count.

dibs has seen this section open 12 times since 17 August. The last time was 30 September. 5 of those were readings where the capacity figure moved and the enrolled count did not, so dibs could not tell whether a seat existed and did not send an alert.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.

Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

From the registrar limited early, then open

Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

3 discussions, none open. There is no waitlist either, so the only way in is somebody dropping the lecture.

No discussion is open. Whatever the lecture reads, there is currently nothing here to enroll in.
  • Dis 1A

    F 2:00pm-2:50pm

    Luberto, J.

    Closed.

  • Dis 1B

    F 3:00pm-3:50pm

    Luberto, J.

    Closed.

  • Dis 1C

    F 4:00pm-4:50pm

    Luberto, J.

    Closed.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 1:00pm-1:50pm

Kinsey Science Teaching Pavilion 1240B

Grades

3.37
predicted, this instructor · 113 grades

2 other people have taught ASTR 4 in the grade record: SHAPLEY, ALICE EVE at 3.18 over 134 grades and MALKAN, MATTHEW ARNOLD at 2.87 over 66 grades.

A range
61%
P/NP
14%
D/F/W
4.4%

Full grade history for ASTR 4

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

Workload, very light. 5.0 of 5 for James Larkin, where 5 is lightest. Read 30 days ago.

What the work looks like

  • Exams mentioned, no number given, said by 4 reviewers
  • Quizzes mentioned, no number given, said by 2 reviewers
  • Problem sets mentioned, no number given, said by 1 reviewer

Read from 64 reviews about 1 month ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

ASTR 4 reviews for James Larkin Reviews for all professors of ASTR 4

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 6522S
  • 3222F
  • 4423F
  • 6724F
  • 8325S
  • 8525F
Enrollment by term: 22S 65, 22F 32, 23F 44, 24F 67, 25S 83, 25F 85

Peak 85 · most recent 25F at 85

Seats over time

Filled by 11 over about 2 months

12 times reopened
90 of 90 · no seats left in its discussions
17 Aug 12:329 Sep 02:371 Oct 16:42
dibs read 168 of the 556 hours its hourly record covers, 30%, and did not look in 388. dibs had no hourly record before 8 Sep, which is the other 529 of 1085 plotted.90 of 90 enrolled at the newest reading, 71 minutes ago, and no seats left in its discussions. Seats from 17 Aug 12:32 to 1 Oct 16:42, 79 to 90. dibs read 168 of the 556 hours its hourly record here covers, 30%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 388 hours dibs was keeping a record and did not reach this section. Nothing before 8 September at 13:00, where this section's record starts, has a read either way, which is 529 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not: 71 minutes ago.

Show the readings (49)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 16:42 90 90 closed - 7 of 22
30 Sep 19:22 90 90 closed - 5 of 15
30 Sep 05:22 89 90 open - 30 of 101
26 Sep 01:12 90 90 closed - 3 of 8
25 Sep 18:12 89 90 open - 2 of 5
25 Sep 14:42 90 90 closed - 2 of 4
25 Sep 11:12 89 90 open - 39 of 133
19 Sep 23:42 90 90 closed - 7 of 21
19 Sep 03:52 89 90 open - 2 of 4
19 Sep 00:32 90 90 closed - 2 of 3
18 Sep 22:02 89 90 open - 2 of 5
18 Sep 18:32 90 90 closed - 2 of 4
18 Sep 15:12 89 90 open - 12 of 35
17 Sep 05:22 90 90 closed - 2 of 6
17 Sep 00:52 89 90 open - 3 of 8
16 Sep 17:52 88 90 open - 5 of 14
16 Sep 04:12 87 90 open - 4 of 12
15 Sep 17:02 88 90 open - 5 of 16
15 Sep 02:22 87 90 open - 2 of 5
14 Sep 22:52 88 90 open - 3 of 7
14 Sep 16:12 87 90 open - 12 of 39
13 Sep 02:52 88 90 open - 9 of 26
12 Sep 01:22 89 90 open - 2 of 3
11 Sep 23:02 85 90 open - 2 of 3
11 Sep 21:32 89 90 open - 3 of 7
11 Sep 15:40 85 90 open - 7 of 27
10 Sep 13:40 86 90 open - 5 of 13
10 Sep 01:40 86 87 open - 10 of 25
9 Sep 01:40 84 87 open - 2 of 2
9 Sep 00:40 84 85 open - 2 of 3
8 Sep 22:40 84 87 open - 5 of 46, 36 no hourly record
7 Sep 01:40 84 85 open - no hourly record
5 Sep 02:40 85 85 closed - no hourly record
3 Sep 11:27 83 85 open - no hourly record
3 Sep 01:40 83 83 closed - no hourly record
2 Sep 01:40 81 83 open - no hourly record
26 Aug 00:40 82 83 open - no hourly record
25 Aug 23:40 81 83 open - no hourly record
25 Aug 20:55 82 83 open - no hourly record
25 Aug 19:55 81 83 open - no hourly record
25 Aug 18:55 82 83 open - no hourly record
24 Aug 10:55 81 83 open - no hourly record
20 Aug 17:55 81 81 closed - no hourly record
19 Aug 17:55 79 81 open - no hourly record
19 Aug 15:55 79 79 closed - no hourly record
19 Aug 14:55 79 81 open - no hourly record
19 Aug 13:55 79 79 closed - no hourly record
19 Aug 11:55 79 81 open - no hourly record
17 Aug 12:32 79 79 closed - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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