C/2024 E2 (Bok)
| Parameter |
Value |
| Designation |
C/2024 E2 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-23T18:35:47.109120Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:25Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-03-10T06:03:37.900800Z |
| Discovery magnitude (MPC) |
22.75 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-03-17.0000000 |
| e |
0.85195999 |
| q (au) |
7.692115 |
| a (au) |
51.959703 |
| i (deg) |
155.652171 |
| Ω (om, deg) |
135.652797 |
| ω (w, deg) |
358.035418 |
| M (ma, deg) |
0.382161 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.032 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.032 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.890 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
05:53:07.17 |
+41:50:26.6 |
HIP 28088 |
35.73 |
| 2026-02-03 12:00 |
05:52:46.10 |
+41:49:59.4 |
HIP 27520 |
35.24 |
| 2026-02-04 00:00 |
05:52:25.20 |
+41:49:31.7 |
HIP 27520 |
31.32 |
| 2026-02-04 12:00 |
05:52:04.45 |
+41:49:03.4 |
HIP 27520 |
27.43 |
| 2026-02-05 00:00 |
05:51:43.88 |
+41:48:34.6 |
HIP 27520 |
23.56 |
| 2026-02-05 12:00 |
05:51:23.47 |
+41:48:05.2 |
HIP 27520 |
19.73 |
| 2026-02-06 00:00 |
05:51:03.23 |
+41:47:35.2 |
HIP 27520 |
15.92 |
| 2026-02-06 12:00 |
05:50:43.15 |
+41:47:04.7 |
HIP 27520 |
12.15 |
| 2026-02-07 00:00 |
05:50:23.25 |
+41:46:33.7 |
HIP 27520 |
8.40 |
| 2026-02-07 12:00 |
05:50:03.51 |
+41:46:02.2 |
HIP 27520 |
4.68 |
| 2026-02-08 00:00 |
05:49:43.95 |
+41:45:30.2 |
HIP 27520 |
1.00 |
| 2026-02-08 12:00 |
05:49:24.56 |
+41:44:57.7 |
HIP 27520 |
2.66 |
| 2026-02-09 00:00 |
05:49:05.35 |
+41:44:24.7 |
HIP 27520 |
6.29 |
| 2026-02-09 12:00 |
05:48:46.30 |
+41:43:51.3 |
HIP 27520 |
9.88 |
| 2026-02-10 00:00 |
05:48:27.44 |
+41:43:17.4 |
HIP 27520 |
13.45 |
| 2026-02-10 12:00 |
05:48:08.74 |
+41:42:43.1 |
HIP 27520 |
16.98 |
| 2026-02-11 00:00 |
05:47:50.23 |
+41:42:08.3 |
HIP 27520 |
20.49 |
| 2026-02-11 12:00 |
05:47:31.89 |
+41:41:33.1 |
HIP 27520 |
23.96 |
| 2026-02-12 00:00 |
05:47:13.73 |
+41:40:57.5 |
HIP 27251 |
24.73 |
| 2026-02-12 12:00 |
05:46:55.75 |
+41:40:21.5 |
HIP 27251 |
24.48 |
| 2026-02-13 00:00 |
05:46:37.94 |
+41:39:45.1 |
HIP 27251 |
24.70 |
| 2026-02-13 12:00 |
05:46:20.32 |
+41:39:08.3 |
HIP 27251 |
25.39 |
| 2026-02-14 00:00 |
05:46:02.87 |
+41:38:31.2 |
HIP 27251 |
26.47 |
| 2026-02-14 12:00 |
05:45:45.61 |
+41:37:53.7 |
HIP 27251 |
27.91 |
| 2026-02-15 00:00 |
05:45:28.53 |
+41:37:15.8 |
HIP 26957 |
25.58 |
| 2026-02-15 12:00 |
05:45:11.63 |
+41:36:37.6 |
HIP 26957 |
22.62 |
| 2026-02-16 00:00 |
05:44:54.91 |
+41:35:59.1 |
HIP 26957 |
19.77 |
| 2026-02-16 12:00 |
05:44:38.37 |
+41:35:20.3 |
HIP 26957 |
17.08 |
| 2026-02-17 00:00 |
05:44:22.02 |
+41:34:41.2 |
HIP 26957 |
14.60 |
| 2026-02-17 12:00 |
05:44:05.85 |
+41:34:01.8 |
HIP 26957 |
12.45 |
| 2026-02-18 00:00 |
05:43:49.86 |
+41:33:22.1 |
HIP 26957 |
10.79 |
| 2026-02-18 12:00 |
05:43:34.06 |
+41:32:42.1 |
HIP 26957 |
9.85 |
| 2026-02-19 00:00 |
05:43:18.44 |
+41:32:01.9 |
HIP 26957 |
9.80 |
| 2026-02-19 12:00 |
05:43:03.01 |
+41:31:21.4 |
HIP 26957 |
10.63 |
| 2026-02-20 00:00 |
05:42:47.76 |
+41:30:40.7 |
HIP 26957 |
12.13 |
| 2026-02-20 12:00 |
05:42:32.70 |
+41:29:59.7 |
HIP 26957 |
14.07 |
| 2026-02-21 00:00 |
05:42:17.82 |
+41:29:18.6 |
HIP 26757 |
15.92 |
| 2026-02-21 12:00 |
05:42:03.12 |
+41:28:37.2 |
HIP 26757 |
13.19 |
| 2026-02-22 00:00 |
05:41:48.61 |
+41:27:55.6 |
HIP 26757 |
10.55 |
| 2026-02-22 12:00 |
05:41:34.29 |
+41:27:13.9 |
HIP 26757 |
8.04 |
| 2026-02-23 00:00 |
05:41:20.15 |
+41:26:31.9 |
HIP 26757 |
5.80 |
| 2026-02-23 12:00 |
05:41:06.19 |
+41:25:49.8 |
HIP 26757 |
4.20 |
| 2026-02-24 00:00 |
05:40:52.42 |
+41:25:07.6 |
HIP 26757 |
4.01 |