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Asteroid 1999 KW4

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Asteroid 1999 KW4 Position

Asteroid 1999 KW4 is currently in the constellation of Pisces. The current Right Ascension is 01h 14m 52s and the Declination is +07° 21’ 11”.

01h 14m 52s
+07° 21’ 11”

Simplified sky chart showing where Asteroid 1999 KW4 is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Asteroid 1999 KW4 in Pisces on March, 31 2020
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart showing where Asteroid 1999 KW4 is right now (view fullscreen)

1999 WK4
RA: 01h 14m 52s
Dec: +07° 21’ 11”
Deep sky finder chart for Asteroid 1999 KW4
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 1999 KW4?, a page that provides all the information needed to find Asteroid 1999 KW4 in the sky and additional links to sky charts.

Asteroid 1999 KW4 Distance

The distance of Asteroid 1999 KW4 from Earth is currently 167,683,724 kilometers, equivalent to 1.120896 Astronomical Units. Light takes 9 minutes and 19.3327 seconds to travel from Asteroid 1999 KW4 and arrive to us.

9 minutes and 19.3327 seconds

The following chart shows the distance of Asteroid 1999 KW4 from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Asteroid 1999 KW4 from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 1999 WK4 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 1999 KW4 to Earth

Between January 2013 and December 2100 the closest approach of Asteroid 1999 KW4 to Earth happens on Mon May 26 2036 at a distance of 0.01636316 Astronomical Units, or 2,447,894 kilometers:

Mon May 26 2036

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Asteroid 1999 KW4 brightness

The current visual magnitude of Asteroid 1999 KW4 is 15.18.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 1999 KW4, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 1999 KW4 between January 2013 and December 2100

Asteroid 1999 KW4 rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Asteroid 1999 KW4 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 82.2°
Max altitude: 46.2°
Azimuth: 277.5°
Asteroid 1999 KW4 is below the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Asteroid 1999 KW4 touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid 1999 KW4 Orbital Elements

The following table lists the orbital elements of Asteroid 1999 KW4 at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.68843516
Orbit inclination i 38.88566985°
Perihelion distance q 0.20012988 AU
29,939,004 km
Aphelion distance Q 1.08454578 AU
162,245,740 km
Semi-major axis a 0.64233783 AU
96,092,372 km
Orbital period period 0.5100 years
188.0372 days
Date of perihelion transit Tp 2020-Apr-01 12:06:47
2,458,941.0047 JD
Argument of perihelion peri 192.6420481826°
Longitude of the ascending node node 244.90437889297°
Mean anomaly M 113.90463562773°
Mean motion n 1.91451521°/day

Visualization of Asteroid 1999 KW4 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 1999 KW4 with respect of the Sun and the orbits of the major planets. The position of Asteroid 1999 KW4 and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Asteroid 1999 KW4
View Asteroid 1999 KW4 in the 3D Solar System Simulator

Asteroid 1999 KW4 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 1999 KW4 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 1999 KW4 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Mar 24 23h 53m 34s +08° 50’ 43” 15.91 Pegasus
2020 Mar 25 00h 03m 03s +09° 01’ 15” 15.71 Pisces
2020 Mar 26 00h 12m 53s +09° 07’ 23” 15.51 Pisces
2020 Mar 27 00h 23m 00s +09° 08’ 14” 15.31 Pisces
2020 Mar 28 00h 33m 24s +09° 02’ 48” 15.15 Pisces
2020 Mar 29 00h 43m 59s +08° 49’ 59” 15.04 Pisces
2020 Mar 30 00h 54m 38s +08° 28’ 48” 15.01 Pisces
2020 Mar 31 01h 05m 08s +07° 58’ 32” 15.05 Pisces
2020 Apr 01 01h 15m 20s +07° 19’ 12” 15.19 Pisces
2020 Apr 02 01h 24m 55s +06° 31’ 33” 15.41 Pisces
2020 Apr 03 01h 33m 42s +05° 37’ 20” 15.69 Pisces
2020 Apr 04 01h 41m 36s +04° 38’ 41” 16.03 Pisces
2020 Apr 05 01h 48m 36s +03° 37’ 41” 16.39 Pisces
2020 Apr 06 01h 54m 43s +02° 36’ 03” 16.76 Cetus