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Asteroid Near-Earth

Boreas

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1916 Boreas (1953 RA)

Where is it now

Distance from Sun
3.094 AU
True anomaly
157.05°
Distance from Earth
3.345 AU
As of
11 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth Boreas — 3.094 AU from the Sun Boreas
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Boreas is 3.345 AU from Earth today (27.8 light-minutes).

In the sky

Right ascension
09h 07m 58s
Declination
+25° 33′ 30″
Constellation
Cancer
Distance from Earth
3.34 AU
Elongation from the Sun
67.41° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
2.273 AU
Eccentricity
0.4491
Inclination
12.88°
Orbital period
3.43 years
Perihelion
1.252 AU
Aphelion
3.294 AU
Longitude of ascending node
340.58°
Argument of periapsis
335.9°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 98.5 LD
0.2532 AU
Tisserand (Jupiter)
3.44

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
4,171
Data arc
72.59 years
First observed
1 September 1953
Last observed
6 April 2026
Residual RMS
0.41 ″
Solution · Otto Matic
28 July 2026

Physical properties

Mean radius
1.75 km
Rotation period
3.47 hours

Visual & observation

Absolute magnitude (H)
14.93
Colour index (B–V)
0.85
Spectral type (SMASS)
S
Spectral type (Tholen)
S
Colour index (U–B)
0.41

Discovery & classification

Discovered by
Arend, S. J.
Discovery date
1 September 1953
Discovery site
Uccle

Also known as 1916 · 1953 RA

Amor Near-Earth Object Named

Sources