2019 WP4 is an asteroid in the Aten orbit class. Its orbit takes it from 0.64 AU to 1.32 AU from the Sun; one orbit takes 354.1 days. Orbit from the JPL solution of 1 January 2024.
Where is it now
- Distance from Sun
- 1.221 AU
- True anomaly
- 148.03°
- Distance from Earth
- 1.182 AU
- As of
- 24 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.
In the sky
- Right ascension
- 10h 01m 49s
- Declination
- +23° 19′ 36″
- Constellation
- Leo
- Distance from Earth
- 1.18 AU
- Elongation from the Sun
- 67.8° — 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.
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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
- 0.98 AU
- Eccentricity
- 0.3477
- Inclination
- 20.69°
- Orbital period
- 354.1 days
- Perihelion
- 0.639 AU
- Aphelion
- 1.32 AU
- Longitude of ascending node
- 66.24°
- Argument of periapsis
- 241.75°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 11.5 LD
- 0.0296 AU
- Tisserand (Jupiter)
- 6.073
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 57
- Data arc
- 9 days
- First observed
- 27 November 2019
- Last observed
- 6 December 2019
- Residual RMS
- 0.45 ″
- Solution · Otto Matic
- 1 January 2024
Visual & observation
- Absolute magnitude (H)
- 24.41
Discovery & classification
Close approaches 37 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-04-25 18:36 UTC close approach of 2019 WP4. Catalogue miss distance 85.9 LD · 3.3 × 10⁷ km. The curve is the geocentric path from 2027-04-22 to 2027-04-28, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2027-04-25 18:36:00 | Earth | 0.2208 AU | 85.9 LD | 16.5 km/s |
| 2028-04-10 20:29:00 | Earth | 0.3113 AU | 121.1 LD | 20.2 km/s |
| 2029-03-30 17:26:00 | Earth | 0.4539 AU | 176.7 LD | 24.9 km/s |
| 2048-09-14 09:57:00 | Venus | 0.0549 AU | 21.4 LD | 16.8 km/s |
| 2049-12-06 03:03:00 | Earth | 0.3406 AU | 132.5 LD | 23.8 km/s |
| 2050-11-29 16:48:00 | Earth | 0.1555 AU | 60.5 LD | 18.6 km/s |
| 2051-11-25 09:31:00 | Earth | 0.0439 AU | 17.1 LD | 14.2 km/s |
| 2052-11-27 19:27:00 | Earth | 0.2166 AU | 84.3 LD | 11.7 km/s |
| 2053-12-15 12:58:00 | Earth | 0.3646 AU | 141.9 LD | 11.5 km/s |
| 2055-01-06 12:48:00 | Earth | 0.4604 AU | 179.2 LD | 11.3 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB