(826936) 1998 HH49
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	22.4	1.606 AU	0.663 AU	03h42m	+36°15'	153.6°	15.8°

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 1998 HH49 are:

            e (Eccentricity)                : 0.5036550
            a (Semimajor axis)              : 1.5579523
            i (Inclination)                 : 8.42869
            Ω (Longitude of ascending node) : 23.44698
            ω (Argument of perihelion)      : 288.23761
            M (Mean anomaly)                : 52.54681
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -48.12966
            B (Latitude of perihelion)      : -8.00244
            P (Orbital period in years)     : 1.94            
        

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
2025-12-15 00:00 UT   03 42 43.9   +36 15 21     0.663    1.606  153.6   15.8   112   22.4 
2025-12-15 07:48 UT   03 42 17.1   +36 12 09     0.667    1.608  153.3   16.0   112   22.4 
2025-12-16 00:00 UT   03 41 23.2   +36 05 33     0.674    1.613  152.6   16.3   110   22.4 
2025-12-17 00:00 UT   03 40 07.8   +35 55 49     0.684    1.619  151.6   16.8   108   22.5 
2025-12-18 00:00 UT   03 38 57.6   +35 46 09     0.695    1.626  150.6   17.3   106   22.5 
2025-12-19 00:00 UT   03 37 52.6   +35 36 36     0.706    1.633  149.6   17.8   105   22.6 
2025-12-20 00:00 UT   03 36 52.5   +35 27 09     0.717    1.639  148.6   18.2   103   22.7 
2025-12-21 00:00 UT   03 35 57.4   +35 17 49     0.729    1.646  147.5   18.7   102   22.7 
2025-12-22 00:00 UT   03 35 07.0   +35 08 39     0.740    1.652  146.5   19.2   101   22.8 
2025-12-23 00:00 UT   03 34 21.3   +34 59 37     0.752    1.659  145.5   19.6    99   22.8 
2025-12-24 00:00 UT   03 33 40.2   +34 50 45     0.764    1.665  144.5   20.1    98   22.9 
2025-12-25 00:00 UT   03 33 03.6   +34 42 03     0.775    1.672  143.5   20.5    97   22.9 
2025-12-26 00:00 UT   03 32 31.2   +34 33 32     0.788    1.678  142.4   20.9    96   23.0 
2025-12-27 00:00 UT   03 32 03.1   +34 25 13     0.800    1.684  141.4   21.3    95   23.1 
2025-12-28 00:00 UT   03 31 39.1   +34 17 05     0.812    1.691  140.4   21.8    94   23.1 
2025-12-29 00:00 UT   03 31 19.0   +34 09 08     0.825    1.697  139.4   22.1    93   23.2 
2025-12-30 00:00 UT   03 31 02.8   +34 01 24     0.838    1.703  138.4   22.5    93   23.2 
2025-12-31 00:00 UT   03 30 50.3   +33 53 52     0.850    1.709  137.5   22.9    92   23.3 
2026-01-01 00:00 UT   03 30 41.4   +33 46 32     0.863    1.716  136.5   23.2    91   23.3 
2026-01-02 00:00 UT   03 30 36.1   +33 39 24     0.876    1.722  135.5   23.6    91   23.4 
2026-01-03 00:00 UT   03 30 34.1   +33 32 29     0.890    1.728  134.5   23.9    90   23.4 
2026-01-04 00:00 UT   03 30 35.4   +33 25 46     0.903    1.734  133.6   24.2    89   23.5 
2026-01-05 00:00 UT   03 30 39.9   +33 19 15     0.916    1.740  132.6   24.6    89   23.5 
2026-01-06 00:00 UT   03 30 47.5   +33 12 56     0.930    1.746  131.7   24.9    88   23.6 
2026-01-07 00:00 UT   03 30 58.1   +33 06 49     0.944    1.752  130.8   25.2    88   23.6 
2026-01-08 00:00 UT   03 31 11.6   +33 00 55     0.958    1.758  129.8   25.4    87   23.7 
2026-01-09 00:00 UT   03 31 28.0   +32 55 12     0.972    1.764  128.9   25.7    87   23.7 
2026-01-10 00:00 UT   03 31 47.0   +32 49 41     0.986    1.770  128.0   26.0    86   23.8 
2026-01-11 00:00 UT   03 32 08.8   +32 44 22     1.000    1.776  127.1   26.2    86   23.8 
2026-01-12 00:00 UT   03 32 33.1   +32 39 14     1.014    1.782  126.2   26.5    86   23.9 
2026-01-13 00:00 UT   03 32 60.0   +32 34 17     1.028    1.787  125.3   26.7    85   23.9 
2026-01-14 00:00 UT   03 33 29.3   +32 29 32     1.043    1.793  124.4   26.9    85   23.9 

    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.