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Asteroid Near-Earth

2021 PH27

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(2021 PH27)

Where is it now

Distance from Sun
0.134 AU
True anomaly
349.34°
Distance from Earth
0.868 AU
As of
15 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.

Sun Earth — 0.997 AU from the Sun Earth 2021 PH27 — 0.134 AU from the Sun 2021 PH27
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 PH27 is 0.868 AU from Earth today (7.2 light-minutes).

In the sky

Right ascension
13h 11m 17s
Declination
-06° 13′ 57″
Constellation
Virgo
Distance from Earth
0.88 AU
Elongation from the Sun
4.41° — too close to the Sun to observe

Visible from both hemispheres.

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
0.462 AU
Eccentricity
0.7115
Inclination
31.94°
Orbital period
114.6 days
Perihelion
0.133 AU
Aphelion
0.79 AU
Longitude of ascending node
39.39°
Argument of periapsis
8.58°
Epoch · J2000
2461200.5
Orbit class · IEO
Atira (interior-Earth object)
Earth MOID · 87.7 LD
0.2253 AU
Tisserand (Jupiter)
11.624

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
114
Data arc
6.99 years
First observed
16 July 2017
Last observed
11 July 2024
Residual RMS
0.41 ″
Solution · Otto Matic
5 May 2025

Visual & observation

Absolute magnitude (H)
17.67

Discovery & classification

Atira Near-Earth Object

Close approaches 127 on record

When (UTC) Body Distance Lunar distances Relative speed
2036-05-17 19:38:00 Venus 0.132 AU 51.4 LD 21.6 km/s
2036-12-25 07:52:00 Venus 0.1074 AU 41.8 LD 21.2 km/s
2037-08-03 22:22:00 Venus 0.075 AU 29.2 LD 21.3 km/s
2038-03-14 07:52:00 Venus 0.0329 AU 12.8 LD 22.2 km/s
2038-10-24 00:42:00 Venus 0.0287 AU 11.2 LD 24.2 km/s
2039-06-06 02:12:00 Venus 0.0889 AU 34.6 LD 27 km/s
2051-10-05 11:29:00 Venus 0.1412 AU 55.0 LD 22 km/s
2052-05-14 03:20:00 Venus 0.118 AU 45.9 LD 21.3 km/s
2052-12-21 14:40:00 Venus 0.0891 AU 34.7 LD 21.2 km/s
2053-07-31 14:31:00 Venus 0.0505 AU 19.6 LD 21.8 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources