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Common neo 21 EP

Boreas

Position computed live · sbdb

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Live ephemeris

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Score breakdown

· 4 badges
21 pts · Common
Common 22 pts → Uncommon
  • Has a proper name +8
  • Near-Earth object +5
  • Amor: shadows Earth's orbit from outside +4
  • Stony asteroid +4
Total score 21

1 more point to reach Uncommon.

Badges

  • Near-Earth object · +5
  • Has a proper name · +8
  • Amor: shadows Earth's orbit from outside · +4
  • Stony asteroid · +4

Trivia

What it actually is

  • Its orbit family. An Amor-class object. It approaches Earth's orbit from outside without ever crossing it — named for the asteroid Amor, which swept past at 16 million km in 1932.
  • Closest approach. At its nearest it comes within 1.25 AU of the Sun — inside the orbit of Mars.
  • One lap. A single orbit around the Sun takes it about 3.4 years.
  • How far it roams. Its orbit swings between 1.25 and 3.29 AU from the Sun.

Sense of scale

  • Sense of scale. In everyday terms it is roughly 0.4× the height of Mount Everest.

By the numbers

  • Size. Roughly 3.5 km across.

What's in a name

  • Named. Notable enough to have earned a proper name, not just a catalogue number.

Properties

aphelion au
3.29
designation
1916
diameter km
3.5
eccentricity
0.4491
full name
1916 Boreas (1953 RA)
h mag
14.93
inclination
12.88
mean motion deg day
0.2876
moid au
0.253
name
Boreas
named
yes
orbit class
AMO
perihelion au
1.252
rotation period h
3.4746
semi major au
2.273
spec taxonomy
S
spect
S

About Boreas

Boreas is a common neo. It has spectral type S and swings within 1.252 AU of the Sun at perihelion.

An Amor-class object. It approaches Earth's orbit from outside without ever crossing it — named for the asteroid Amor, which swept past at 16 million km in 1932.

How to see it

Like any astronomical target, Boreas 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 Boreas is a common neo

Boreas scores 21 points on Spacedle's rarity scale, which places it in the common tier. Another 1 point would lift it into a rarer tier.

That score comes from 4 science badges — Near-Earth object, Has a proper name, Amor: shadows Earth's orbit from outside and Stony 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.