← Back to dex - Far-flung orbit (a > 50 AU) +14
- Has a proper name +8
- Comet +6
- Steeply tilted orbit (i > 40°) +4
Total score 32
2 more points to reach Rare.
Badges
- ☄️ Comet · +6
- 🏷️ Has a proper name · +8
- 🛤️ Far-flung orbit (a > 50 AU) · +14
- 📏 Steeply tilted orbit (i > 40°) · +4
✨ Trivia
What it actually is
- 🛸 Its orbit family. A long-period comet falling in from the Oort Cloud, where it spent billions of years in the deep freeze before something nudged it loose.
- 🌞 Closest approach. At its nearest it comes within 1.12 AU of the Sun — inside the orbit of Mars.
- 🌀 Wild orbit. Its highly elliptical path swings between scorching and frozen each lap.
- 📐 Steeply tilted. Its orbit is tipped 43° out of the flat plane the planets share — it spends most of its time well above or below them.
Standing on it
- 💨 Growing a tail. Once inside roughly the orbit of Mars the ice starts turning straight to gas, blowing out the coma and tail that make a comet a comet.
- ☄️ Tail. Its tail always points away from the Sun, never trailing behind its motion — it is blown, not dragged.
By the numbers
- 🧊 Made of. A comet is a dirty snowball: water ice, frozen carbon dioxide and dust, held together loosely enough that some simply crumble when the Sun warms them.
What's in a name
- 🏷️ Named. Notable enough to have earned a proper name, not just a catalogue number.
Properties
- aphelion au
- 297553.4
- designation
- 1977 H1
- eccentricity
- 1
- full name
- C/1977 H1 (Helin)
- inclination
- 43.19
- mean motion deg day
- 0
- moid au
- 0.442
- name
- C/1977 H1 (Helin)
- named
- yes
- orbit class
- COM
- perihelion au
- 1.118
- semi major au
- 148800
About C/1977 H1 (Helin)
C/1977 H1 (Helin) is an uncommon comet. It swings within 1.118 AU of the Sun at perihelion.
A long-period comet falling in from the Oort Cloud, where it spent billions of years in the deep freeze before something nudged it loose.
How to see it
Like any astronomical target, C/1977 H1 (Helin) is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. Because it moves against the background stars, the live position panel on this page tracks where it is right now. The visibility panel above works out tonight's viewing window for your saved location.
Why C/1977 H1 (Helin) is an uncommon comet
C/1977 H1 (Helin) scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.
That score comes from 4 science badges — Comet, Has a proper name, Far-flung orbit (a > 50 AU) and Steeply tilted orbit (i > 40°) — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.