2007 HL4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Jun 2026	24.1	1.153 AU	0.327 AU	23h29m	-28°02'	106.6°	57.7°

The interactive orbit chart above shows the body's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of 2007 HL4 are:

            e (Eccentricity)                : 0.0907007
            a (Semimajor axis)              : 1.1201096
            i (Inclination)                 : 6.53782
            Ω (Longitude of ascending node) : 30.96445
            ω (Argument of perihelion)      : 139.34391
            M (Mean anomaly)                : 287.56727
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -9.50697
            B (Latitude of perihelion)      : 4.25417
            P (Orbital period in years)     : 1.19            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.

The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.

The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-06-21 00:00 UT   23 29 05.6   -28 02 19     0.327    1.153  106.6   57.7   252   24.1 
2026-06-21 18:53 UT   23 30 42.3   -28 05 32     0.325    1.154  106.9   57.4   252   24.0 
2026-06-22 00:00 UT   23 31 08.2   -28 06 26     0.325    1.154  107.0   57.3   252   24.0 
2026-06-23 00:00 UT   23 33 08.4   -28 10 45     0.323    1.155  107.5   57.0   252   24.0 
2026-06-24 00:00 UT   23 35 06.0   -28 15 17     0.322    1.157  108.0   56.7   253   24.0 
2026-06-25 00:00 UT   23 37 01.0   -28 20 03     0.320    1.158  108.5   56.3   253   24.0 
2026-06-26 00:00 UT   23 38 53.4   -28 25 02     0.318    1.159  109.0   56.0   253   24.0 
2026-06-27 00:00 UT   23 40 43.2   -28 30 15     0.316    1.161  109.5   55.7   253   23.9 
2026-06-28 00:00 UT   23 42 30.3   -28 35 42     0.314    1.162  110.0   55.3   254   23.9 
2026-06-29 00:00 UT   23 44 14.6   -28 41 24     0.312    1.163  110.5   54.9   254   23.9 
2026-06-30 00:00 UT   23 45 56.0   -28 47 21     0.311    1.165  111.0   54.6   254   23.9 
2026-07-01 00:00 UT   23 47 34.6   -28 53 34     0.309    1.166  111.5   54.2   255   23.9 
2026-07-02 00:00 UT   23 49 10.2   -29 00 03     0.307    1.167  112.1   53.8   255   23.8 
2026-07-03 00:00 UT   23 50 42.7   -29 06 48     0.305    1.168  112.6   53.4   255   23.8 
2026-07-04 00:00 UT   23 52 12.2   -29 13 49     0.303    1.170  113.2   53.0   256   23.8 
2026-07-05 00:00 UT   23 53 38.4   -29 21 08     0.301    1.171  113.7   52.6   256   23.8 
2026-07-06 00:00 UT   23 55 01.3   -29 28 44     0.299    1.172  114.3   52.2   257   23.7 
2026-07-07 00:00 UT   23 56 20.8   -29 36 39     0.297    1.173  114.9   51.8   257   23.7 
2026-07-08 00:00 UT   23 57 36.8   -29 44 51     0.295    1.174  115.5   51.4   257   23.7 
2026-07-09 00:00 UT   23 58 49.2   -29 53 22     0.294    1.176  116.1   51.0   258   23.7 
2026-07-10 00:00 UT   23 59 57.9   -30 02 11     0.292    1.177  116.7   50.5   258   23.7 
2026-07-11 00:00 UT   00 01 02.8   -30 11 20     0.290    1.178  117.3   50.1   259   23.6 
2026-07-12 00:00 UT   00 02 03.7   -30 20 46     0.288    1.179  117.9   49.6   260   23.6 
2026-07-13 00:00 UT   00 03 00.6   -30 30 32     0.286    1.180  118.6   49.1   260   23.6 
2026-07-14 00:00 UT   00 03 53.3   -30 40 35     0.284    1.181  119.2   48.7   261   23.6 
2026-07-15 00:00 UT   00 04 41.7   -30 50 57     0.282    1.182  119.9   48.2   261   23.5 
2026-07-16 00:00 UT   00 05 25.8   -31 01 37     0.280    1.184  120.5   47.7   262   23.5 

    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.