To convert sidereal days to seconds, multiply the value by 86,164.1. To go the other way, multiply seconds by 1.16058 × 10⁻⁵ to get sidereal days.
| Sidereal Days (sid d) | Seconds (s) |
|---|---|
| 1 sid d | 86,164.1 s |
| 2 sid d | 172,328 s |
| 3 sid d | 258,492 s |
| 4 sid d | 344,656 s |
| 5 sid d | 430,820 s |
| 6 sid d | 516,985 s |
| 7 sid d | 603,149 s |
| 8 sid d | 689,313 s |
| 9 sid d | 775,477 s |
| 10 sid d | 861,641 s |
| 12 sid d | 1,033,970 s |
| 14 sid d | 1,206,300 s |
| 15 sid d | 1,292,460 s |
| 20 sid d | 1,723,280 s |
| 21 sid d | 1,809,450 s |
| 24 sid d | 2,067,940 s |
| 25 sid d | 2,154,100 s |
| 30 sid d | 2,584,920 s |
| 40 sid d | 3,446,560 s |
| 50 sid d | 4,308,200 s |
| 60 sid d | 5,169,850 s |
| 75 sid d | 6,462,310 s |
| 80 sid d | 6,893,130 s |
| 100 sid d | 8,616,410 s |
| 200 sid d | 17,232,800 s |
| 250 sid d | 21,541,000 s |
| 300 sid d | 25,849,200 s |
| 400 sid d | 34,465,600 s |
| 500 sid d | 43,082,000 s |
| 750 sid d | 64,623,100 s |
| 1,000 sid d | 86,164,100 s |
Sidereal day (sid d). A sidereal day (23 h 56 min 4.09 s) is one rotation of the Earth relative to the stars.
Second (s). The second is the SI base unit of time, defined by the caesium-133 atom.
There are 86,164.1 seconds in one sidereal day.
Multiply the number of sidereal days by 86,164.1. For example, 10 sidereal days equal 861,641 seconds.
One second equals 1.16058 × 10⁻⁵ sidereal days.
1,033,970 seconds. Other common values: 5 sidereal days = 430,820 seconds and 100 sidereal days = 8,616,410 seconds.