| Parameter |
Value |
| Designation |
43P/Wolf-Harrington |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-08-28T10:29:35.073600Z |
| Orbit solution date (soln_date, UTC) |
2026-05-29T11:29:31Z |
| Obs used |
3594 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
10.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-07-24.0000000 |
| e |
0.43873308 |
| q (au) |
2.417313 |
| a (au) |
4.306887 |
| i (deg) |
9.393010 |
| Ω (om, deg) |
244.426110 |
| ω (w, deg) |
224.046767 |
| M (ma, deg) |
157.197328 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.038 + 3.798\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.038 |
| n |
3.798 |
| gf |
1.000 |
| gb |
-0.986 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
10:55:23.33 |
-02:37:33.5 |
HIP 53369 |
15.78 |
| 2026-06-01 12:00 |
10:55:45.43 |
-02:38:00.1 |
HIP 53443 |
15.91 |
| 2026-06-02 00:00 |
10:56:07.71 |
-02:38:28.3 |
HIP 53443 |
15.25 |
| 2026-06-02 12:00 |
10:56:30.15 |
-02:38:58.1 |
HIP 53443 |
16.56 |
| 2026-06-03 00:00 |
10:56:52.77 |
-02:39:29.6 |
HIP 53443 |
19.48 |
| 2026-06-03 12:00 |
10:57:15.54 |
-02:40:02.6 |
HIP 53443 |
23.46 |
| 2026-06-04 00:00 |
10:57:38.49 |
-02:40:37.2 |
HIP 53443 |
28.06 |
| 2026-06-04 12:00 |
10:58:01.60 |
-02:41:13.4 |
HIP 53668 |
29.64 |
| 2026-06-05 00:00 |
10:58:24.87 |
-02:41:51.2 |
HIP 53668 |
28.39 |
| 2026-06-05 12:00 |
10:58:48.30 |
-02:42:30.6 |
HIP 53668 |
28.34 |
| 2026-06-06 00:00 |
10:59:11.89 |
-02:43:11.5 |
HIP 53668 |
29.53 |
| 2026-06-06 12:00 |
10:59:35.64 |
-02:43:53.9 |
HIP 53875 |
30.70 |
| 2026-06-07 00:00 |
10:59:59.54 |
-02:44:38.0 |
HIP 53875 |
26.28 |
| 2026-06-07 12:00 |
11:00:23.60 |
-02:45:23.5 |
HIP 53875 |
22.61 |
| 2026-06-08 00:00 |
11:00:47.81 |
-02:46:10.6 |
HIP 53875 |
20.13 |
| 2026-06-08 12:00 |
11:01:12.18 |
-02:46:59.1 |
HIP 53875 |
19.35 |
| 2026-06-09 00:00 |
11:01:36.70 |
-02:47:49.2 |
HIP 53907 |
19.03 |
| 2026-06-09 12:00 |
11:02:01.37 |
-02:48:40.8 |
HIP 54013 |
17.64 |
| 2026-06-10 00:00 |
11:02:26.18 |
-02:49:33.9 |
HIP 54013 |
13.93 |
| 2026-06-10 12:00 |
11:02:51.15 |
-02:50:28.5 |
HIP 54013 |
12.47 |
| 2026-06-11 00:00 |
11:03:16.26 |
-02:51:24.6 |
HIP 54013 |
14.05 |
| 2026-06-11 12:00 |
11:03:41.51 |
-02:52:22.2 |
HIP 54156 |
16.31 |
| 2026-06-12 00:00 |
11:04:06.91 |
-02:53:21.2 |
HIP 54156 |
10.15 |
| 2026-06-12 12:00 |
11:04:32.45 |
-02:54:21.7 |
HIP 54156 |
4.67 |
| 2026-06-13 00:00 |
11:04:58.13 |
-02:55:23.6 |
HIP 54156 |
4.92 |
| 2026-06-13 12:00 |
11:05:23.95 |
-02:56:27.0 |
HIP 54156 |
10.57 |
| 2026-06-14 00:00 |
11:05:49.91 |
-02:57:31.8 |
HIP 54156 |
16.90 |
| 2026-06-14 12:00 |
11:06:16.01 |
-02:58:38.1 |
HIP 54156 |
23.40 |
| 2026-06-15 00:00 |
11:06:42.25 |
-02:59:45.7 |
HIP 54156 |
29.98 |
| 2026-06-15 12:00 |
11:07:08.62 |
-03:00:54.8 |
HIP 54489 |
31.69 |
| 2026-06-16 00:00 |
11:07:35.12 |
-03:02:05.3 |
HIP 54489 |
27.29 |
| 2026-06-16 12:00 |
11:08:01.75 |
-03:03:17.2 |
HIP 54489 |
23.99 |
| 2026-06-17 00:00 |
11:08:28.52 |
-03:04:30.5 |
HIP 54546 |
19.45 |
| 2026-06-17 12:00 |
11:08:55.41 |
-03:05:45.1 |
HIP 54546 |
13.56 |
| 2026-06-18 00:00 |
11:09:22.43 |
-03:07:01.1 |
HIP 54546 |
9.08 |
| 2026-06-18 12:00 |
11:09:49.58 |
-03:08:18.5 |
HIP 54546 |
8.70 |
| 2026-06-19 00:00 |
11:10:16.85 |
-03:09:37.2 |
HIP 54546 |
12.85 |
| 2026-06-19 12:00 |
11:10:44.25 |
-03:10:57.3 |
HIP 54546 |
18.77 |
| 2026-06-20 00:00 |
11:11:11.76 |
-03:12:18.7 |
HIP 54546 |
25.27 |
| 2026-06-20 12:00 |
11:11:39.40 |
-03:13:41.4 |
HIP 54546 |
32.01 |
| 2026-06-21 00:00 |
11:12:07.16 |
-03:15:05.4 |
HIP 54781 |
36.96 |
| 2026-06-21 12:00 |
11:12:35.03 |
-03:16:30.6 |
HIP 54781 |
33.85 |
| 2026-06-22 00:00 |
11:13:03.02 |
-03:17:57.2 |
HIP 54781 |
32.02 |