| Parameter |
Value |
| Designation |
53P/Van Biesbroeck |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-04-30T19:59:30.923520Z |
| Orbit solution date (soln_date, UTC) |
2026-03-09T09:09:38Z |
| Obs used |
2926 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
9.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-08-29.0000000 |
| e |
0.55103774 |
| q (au) |
2.426494 |
| a (au) |
5.404674 |
| i (deg) |
6.611054 |
| Ω (om, deg) |
148.898788 |
| ω (w, deg) |
134.261588 |
| M (ma, deg) |
226.112232 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
10:02:42.87 |
+12:20:44.6 |
HIP 49158 |
12.94 |
| 2026-07-29 12:00 |
10:03:03.33 |
+12:19:03.5 |
HIP 49300 |
15.78 |
| 2026-07-30 00:00 |
10:03:23.83 |
+12:17:22.1 |
HIP 49300 |
11.47 |
| 2026-07-30 12:00 |
10:03:44.37 |
+12:15:40.3 |
HIP 49300 |
8.36 |
| 2026-07-31 00:00 |
10:04:04.95 |
+12:13:58.2 |
HIP 49300 |
8.02 |
| 2026-07-31 12:00 |
10:04:25.57 |
+12:12:15.7 |
HIP 49300 |
10.74 |
| 2026-08-01 00:00 |
10:04:46.23 |
+12:10:33.0 |
HIP 49300 |
14.94 |
| 2026-08-01 12:00 |
10:05:06.93 |
+12:08:49.9 |
HIP 49300 |
19.71 |
| 2026-08-02 00:00 |
10:05:27.67 |
+12:07:06.5 |
HIP 49300 |
24.72 |
| 2026-08-02 12:00 |
10:05:48.44 |
+12:05:22.8 |
HIP 49433 |
27.40 |
| 2026-08-03 00:00 |
10:06:09.26 |
+12:03:38.8 |
HIP 49433 |
30.36 |
| 2026-08-03 12:00 |
10:06:30.10 |
+12:01:54.4 |
HIP 49669 |
27.75 |
| 2026-08-04 00:00 |
10:06:50.99 |
+12:00:09.8 |
HIP 49669 |
22.47 |
| 2026-08-04 12:00 |
10:07:11.91 |
+11:58:24.8 |
HIP 49669 |
17.26 |
| 2026-08-05 00:00 |
10:07:32.86 |
+11:56:39.6 |
HIP 49669 |
12.21 |
| 2026-08-05 12:00 |
10:07:53.85 |
+11:54:54.0 |
HIP 49669 |
7.67 |
| 2026-08-06 00:00 |
10:08:14.88 |
+11:53:08.2 |
HIP 49669 |
5.23 |
| 2026-08-06 12:00 |
10:08:35.93 |
+11:51:22.0 |
HIP 49669 |
7.43 |
| 2026-08-07 00:00 |
10:08:57.02 |
+11:49:35.6 |
HIP 49669 |
11.95 |
| 2026-08-07 12:00 |
10:09:18.15 |
+11:47:48.9 |
HIP 49669 |
17.03 |
| 2026-08-08 00:00 |
10:09:39.30 |
+11:46:01.9 |
HIP 49669 |
22.30 |
| 2026-08-08 12:00 |
10:10:00.48 |
+11:44:14.6 |
HIP 49669 |
27.66 |
| 2026-08-09 00:00 |
10:10:21.70 |
+11:42:27.0 |
HIP 49925 |
26.72 |
| 2026-08-09 12:00 |
10:10:42.95 |
+11:40:39.2 |
HIP 49925 |
25.06 |
| 2026-08-10 00:00 |
10:11:04.22 |
+11:38:51.0 |
HIP 49925 |
24.55 |
| 2026-08-10 12:00 |
10:11:25.53 |
+11:37:02.7 |
HIP 49925 |
25.26 |
| 2026-08-11 00:00 |
10:11:46.86 |
+11:35:14.0 |
HIP 49925 |
27.10 |
| 2026-08-11 12:00 |
10:12:08.22 |
+11:33:25.1 |
HIP 49925 |
29.87 |
| 2026-08-12 00:00 |
10:12:29.60 |
+11:31:35.9 |
HIP 49925 |
33.35 |
| 2026-08-12 12:00 |
10:12:51.02 |
+11:29:46.5 |
HIP 49925 |
37.33 |
| 2026-08-13 00:00 |
10:13:12.46 |
+11:27:56.8 |
HIP 50225 |
38.07 |
| 2026-08-13 12:00 |
10:13:33.92 |
+11:26:06.9 |
HIP 50225 |
35.60 |
| 2026-08-14 00:00 |
10:13:55.41 |
+11:24:16.8 |
HIP 50110 |
33.78 |
| 2026-08-14 12:00 |
10:14:16.92 |
+11:22:26.4 |
HIP 50110 |
32.58 |
| 2026-08-15 00:00 |
10:14:38.45 |
+11:20:35.8 |
HIP 50297 |
29.75 |
| 2026-08-15 12:00 |
10:15:00.01 |
+11:18:44.9 |
HIP 50297 |
27.41 |
| 2026-08-16 00:00 |
10:15:21.58 |
+11:16:53.8 |
HIP 50297 |
26.07 |
| 2026-08-16 12:00 |
10:15:43.18 |
+11:15:02.5 |
HIP 50297 |
25.90 |
| 2026-08-17 00:00 |
10:16:04.80 |
+11:13:11.0 |
HIP 50424 |
25.01 |
| 2026-08-17 12:00 |
10:16:26.44 |
+11:11:19.3 |
HIP 50424 |
20.23 |
| 2026-08-18 00:00 |
10:16:48.10 |
+11:09:27.3 |
HIP 50424 |
16.00 |
| 2026-08-18 12:00 |
10:17:09.77 |
+11:07:35.2 |
HIP 50424 |
12.89 |
| 2026-08-19 00:00 |
10:17:31.47 |
+11:05:42.8 |
HIP 50424 |
11.82 |