#penumbra

Live, measured metrics for the hashtag #penumbra from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #penumbra

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$110.68/ year · 8-character #name
Claim #penumbra — $110.68/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
1.4
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.online (Mastodon public tags API) · fetched 2026-09-26 10:37 UTC
0
09-20
0
09-21
0
09-22
0
09-23
0
09-24
0
09-25
0
09-26

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-09-26 10:37 UTC

No related tags with measured usage found for #penumbra.

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-09-26 10:37 UTC

Everything below is measured over the latest 40 public posts (spanning ~19341 hours).

Posting hours (UTC) — busiest: 02:00

00:0012:0023:00

Languages: English (28) · French (4) · German (3) · Spanish (2) · Czech (1)

Avg boosts / post: 0.4

Top of the latest posts

  • I saw the #solareclipse of August 2026 from #Drachenberg in #Berlin, with about 80 percent #coverage. If an observer, like myself, is situated in the Moon's #penumbra rather than its #umbra, they see a #partial solar eclipse. L. A. Aguilar

    Stefan F. Wirth@[email protected]♥ 53↻ 12026-08-13 22:56 UTCView post →
  • La cafetera espera. Negra, silenciosa, suspendida sobre una llama temblorosa que nace de una vela. Debajo, unas latas viejas hacen de soporte improvisado. No hay cocina, no hay gas, no hay electricidad. Solo ingenio forzado y costumbre apre

  • They didn't think about the extras required by the Bajor Wedding Planner for the Emissary. 💒 #AllStarTrek #StarTrekDS9 #DS9 #Penumbra @allstartrek

    Joe Wynne 🌻🚗⛰️@[email protected]♥ 1↻ 12024-05-30 02:46 UTCView post →

What “penumbra” means

Wiktionary · Wikipedia

penumbra/pəˈnʌmbɹə/

  • nounA partially shaded area around the edges of a shadow, especially an eclipse.
Full entry on Wiktionary →

The umbra, penumbra and antumbra are three distinct parts of a shadow, made by any light source after impinging on an opaque object of lesser size. In cases of equal or larger impinging objects, only an umbra and penumbra are generated. Assuming no diffraction, for a collimated beam of light, only the umbra is cast.

“Umbra, penumbra and antumbra” on Wikipedia (CC BY-SA) →

#penumbra across platforms

every network with a public tag surface

Follow #penumbra straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/penumbra