| 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) |
| 2026-09-20 00:00 |
10:40:53.01 |
+09:01:28.3 |
HIP 52187 |
20.61 |
| 2026-09-20 12:00 |
10:41:14.71 |
+08:59:30.5 |
HIP 52187 |
24.54 |
| 2026-09-21 00:00 |
10:41:36.39 |
+08:57:32.7 |
HIP 52315 |
24.00 |
| 2026-09-21 12:00 |
10:41:58.06 |
+08:55:35.0 |
HIP 52315 |
23.44 |
| 2026-09-22 00:00 |
10:42:19.70 |
+08:53:37.4 |
HIP 52315 |
24.24 |
| 2026-09-22 12:00 |
10:42:41.32 |
+08:51:39.8 |
HIP 52528 |
25.60 |
| 2026-09-23 00:00 |
10:43:02.92 |
+08:49:42.3 |
HIP 52528 |
20.63 |
| 2026-09-23 12:00 |
10:43:24.50 |
+08:47:44.9 |
HIP 52528 |
16.15 |
| 2026-09-24 00:00 |
10:43:46.06 |
+08:45:47.6 |
HIP 52528 |
12.66 |
| 2026-09-24 12:00 |
10:44:07.59 |
+08:43:50.3 |
HIP 52528 |
11.15 |
| 2026-09-25 00:00 |
10:44:29.11 |
+08:41:53.2 |
HIP 52528 |
12.36 |
| 2026-09-25 12:00 |
10:44:50.59 |
+08:39:56.1 |
HIP 52528 |
15.65 |
| 2026-09-26 00:00 |
10:45:12.05 |
+08:37:59.1 |
HIP 52528 |
20.02 |
| 2026-09-26 12:00 |
10:45:33.49 |
+08:36:02.3 |
HIP 52528 |
24.91 |
| 2026-09-27 00:00 |
10:45:54.90 |
+08:34:05.5 |
HIP 52528 |
30.06 |
| 2026-09-27 12:00 |
10:46:16.29 |
+08:32:08.8 |
HIP 52838 |
33.91 |
| 2026-09-28 00:00 |
10:46:37.65 |
+08:30:12.3 |
HIP 52838 |
30.76 |
| 2026-09-28 12:00 |
10:46:58.98 |
+08:28:15.8 |
HIP 52838 |
28.38 |
| 2026-09-29 00:00 |
10:47:20.29 |
+08:26:19.5 |
HIP 52871 |
24.50 |
| 2026-09-29 12:00 |
10:47:41.56 |
+08:24:23.3 |
HIP 52871 |
19.06 |
| 2026-09-30 00:00 |
10:48:02.81 |
+08:22:27.2 |
HIP 52871 |
13.74 |
| 2026-09-30 12:00 |
10:48:24.03 |
+08:20:31.3 |
HIP 52871 |
8.80 |
| 2026-10-01 00:00 |
10:48:45.22 |
+08:18:35.5 |
HIP 52871 |
5.35 |
| 2026-10-01 12:00 |
10:49:06.38 |
+08:16:39.8 |
HIP 52871 |
6.50 |
| 2026-10-02 00:00 |
10:49:27.50 |
+08:14:44.3 |
HIP 52871 |
10.85 |
| 2026-10-02 12:00 |
10:49:48.60 |
+08:12:49.0 |
HIP 52871 |
15.98 |
| 2026-10-03 00:00 |
10:50:09.66 |
+08:10:53.8 |
HIP 52871 |
21.31 |
| 2026-10-03 12:00 |
10:50:30.69 |
+08:08:58.7 |
HIP 53071 |
19.22 |
| 2026-10-04 00:00 |
10:50:51.69 |
+08:07:03.8 |
HIP 53071 |
14.23 |
| 2026-10-04 12:00 |
10:51:12.65 |
+08:05:09.1 |
HIP 53071 |
9.84 |
| 2026-10-05 00:00 |
10:51:33.58 |
+08:03:14.6 |
HIP 53071 |
7.25 |
| 2026-10-05 12:00 |
10:51:54.47 |
+08:01:20.3 |
HIP 53071 |
8.31 |
| 2026-10-06 00:00 |
10:52:15.32 |
+07:59:26.1 |
HIP 53071 |
12.09 |
| 2026-10-06 12:00 |
10:52:36.14 |
+07:57:32.2 |
HIP 53148 |
15.52 |
| 2026-10-07 00:00 |
10:52:56.92 |
+07:55:38.4 |
HIP 53148 |
18.87 |
| 2026-10-07 12:00 |
10:53:17.66 |
+07:53:44.9 |
HIP 53148 |
23.04 |
| 2026-10-08 00:00 |
10:53:38.36 |
+07:51:51.6 |
HIP 53318 |
18.46 |
| 2026-10-08 12:00 |
10:53:59.02 |
+07:49:58.5 |
HIP 53318 |
14.40 |
| 2026-10-09 00:00 |
10:54:19.64 |
+07:48:05.6 |
HIP 53318 |
11.54 |
| 2026-10-09 12:00 |
10:54:40.22 |
+07:46:12.9 |
HIP 53318 |
10.88 |
| 2026-10-10 00:00 |
10:55:00.76 |
+07:44:20.5 |
HIP 53318 |
12.75 |
| 2026-10-10 12:00 |
10:55:21.25 |
+07:42:28.3 |
HIP 53440 |
8.98 |
| 2026-10-11 00:00 |
10:55:41.70 |
+07:40:36.4 |
HIP 53440 |
3.76 |