This object moves — fetching its current position…
Score breakdown
· 6 badges
43 pts · Rare
Rare50 pts → Epic
Metal-rich asteroid+14
Potentially hazardous+12
Barely turning (over 100 hours)+8
Near-Earth object+5
Apollo: crosses Earth's orbit+4
Catalogue designation only+0
Total score43
7 more points to reach Epic.
Badges
🌠Near-Earth object· +5
⚠️Potentially hazardous· +12
🔢Catalogue designation only
🏛️Apollo: crosses Earth's orbit· +4
🐌Barely turning (over 100 hours)· +8
⚙️Metal-rich asteroid· +14
✨ Trivia
Handle with care
🛡️What 'hazardous' means. 'Potentially hazardous' is bookkeeping, not a prediction: it means the orbit passes within 0.05 AU of Earth's and the body is big enough to matter. Nothing on that list is known to be on a collision course.
☄️If it ever hit. A rock this size arriving at a typical 20 km/s would release around 22.3 million megatons — the same league as the impact that ended the age of the dinosaurs.
What it actually is
🛸Its orbit family. An Apollo-class object: its orbit is wider than Earth's but crosses it. Most known Earth-crossers belong to this family.
🌞Closest approach. At its nearest it comes within 0.98 AU of the Sun — inside the orbit of Earth.
🔁One lap. A single orbit around the Sun takes it about 4.5 years.
🥏How far it roams. Its orbit swings between 0.98 and 4.47 AU from the Sun.
Sense of scale
🧱Sense of scale. In everyday terms it is roughly 0.8× the height of Mount Everest.
By the numbers
📐Size. Roughly 7 km across.
Properties
aphelion au
4.47
designation
53319
diameter km
7
eccentricity
0.6416
full name
53319 (1999 JM8)
h mag
15.35
inclination
13.84
mean motion deg day
0.2192
moid au
0.0256
name
(53319) 1999 JM8
number only
yes
orbit class
APO
perihelion au
0.976
pha
yes
rotation period h
143.7
semi major au
2.724
spec taxonomy
X:
spect
X:
About (53319) 1999 JM8
(53319) 1999 JM8 is a rare neo. It has spectral type X: and swings within 0.976 AU of the Sun at perihelion.
An Apollo-class object: its orbit is wider than Earth's but crosses it. Most known Earth-crossers belong to this family.
How to see it
Like any astronomical target, (53319) 1999 JM8 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 (53319) 1999 JM8 is a rare neo
(53319) 1999 JM8 scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.
That score comes from 6 science badges — Near-Earth object, Potentially hazardous, Catalogue designation only, Apollo: crosses Earth's orbit, Barely turning (over 100 hours) and Metal-rich asteroid — 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.