| Parameter |
Value |
| Designation |
C/2022 B4 |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-01-29T21:29:47.313600Z |
| Orbit solution date (soln_date, UTC) |
2022-04-14T14:49:33Z |
| Obs used |
128 |
| NEO |
- |
| M1 |
21.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-29T11:09:26.064000Z |
| Discovery magnitude (MPC) |
20.81 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-02-26.0000000 |
| e |
0.99639588 |
| q (au) |
1.379643 |
| a (au) |
382.796465 |
| i (deg) |
20.043251 |
| Ω (om, deg) |
340.661761 |
| ω (w, deg) |
152.955070 |
| M (ma, deg) |
0.003567 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 5.943\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
5.943 |
| gf |
1.000 |
| gb |
-0.814 |
| k |
0.994 |
| 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) |
| 2026-06-01 00:00 |
18:53:43.11 |
-42:04:32.0 |
HIP 92802 |
9.73 |
| 2026-06-01 12:00 |
18:53:34.08 |
-42:05:00.8 |
HIP 92802 |
11.27 |
| 2026-06-02 00:00 |
18:53:25.00 |
-42:05:29.3 |
HIP 92633 |
11.85 |
| 2026-06-02 12:00 |
18:53:15.85 |
-42:05:57.4 |
HIP 92633 |
10.61 |
| 2026-06-03 00:00 |
18:53:06.65 |
-42:06:25.3 |
HIP 92633 |
9.53 |
| 2026-06-03 12:00 |
18:52:57.39 |
-42:06:52.8 |
HIP 92633 |
8.66 |
| 2026-06-04 00:00 |
18:52:48.08 |
-42:07:20.0 |
HIP 92633 |
8.09 |
| 2026-06-04 12:00 |
18:52:38.72 |
-42:07:46.9 |
HIP 92633 |
7.88 |
| 2026-06-05 00:00 |
18:52:29.30 |
-42:08:13.4 |
HIP 92633 |
8.07 |
| 2026-06-05 12:00 |
18:52:19.84 |
-42:08:39.6 |
HIP 92633 |
8.63 |
| 2026-06-06 00:00 |
18:52:10.32 |
-42:09:05.5 |
HIP 92633 |
9.51 |
| 2026-06-06 12:00 |
18:52:00.75 |
-42:09:31.0 |
HIP 92633 |
10.63 |
| 2026-06-07 00:00 |
18:51:51.13 |
-42:09:56.2 |
HIP 92633 |
11.93 |
| 2026-06-07 12:00 |
18:51:41.46 |
-42:10:21.0 |
HIP 92633 |
13.35 |
| 2026-06-08 00:00 |
18:51:31.75 |
-42:10:45.5 |
HIP 92633 |
14.87 |
| 2026-06-08 12:00 |
18:51:21.99 |
-42:11:09.6 |
HIP 92425 |
13.71 |
| 2026-06-09 00:00 |
18:51:12.18 |
-42:11:33.4 |
HIP 92425 |
11.86 |
| 2026-06-09 12:00 |
18:51:02.33 |
-42:11:56.8 |
HIP 92425 |
10.01 |
| 2026-06-10 00:00 |
18:50:52.43 |
-42:12:19.8 |
HIP 92425 |
8.16 |
| 2026-06-10 12:00 |
18:50:42.49 |
-42:12:42.5 |
HIP 92425 |
6.31 |
| 2026-06-11 00:00 |
18:50:32.51 |
-42:13:04.8 |
HIP 92425 |
4.48 |
| 2026-06-11 12:00 |
18:50:22.49 |
-42:13:26.7 |
HIP 92425 |
2.72 |
| 2026-06-12 00:00 |
18:50:12.43 |
-42:13:48.3 |
HIP 92425 |
1.36 |
| 2026-06-12 12:00 |
18:50:02.33 |
-42:14:09.5 |
HIP 92425 |
1.87 |
| 2026-06-13 00:00 |
18:49:52.20 |
-42:14:30.3 |
HIP 92425 |
3.52 |
| 2026-06-13 12:00 |
18:49:42.03 |
-42:14:50.7 |
HIP 92425 |
5.35 |
| 2026-06-14 00:00 |
18:49:31.82 |
-42:15:10.7 |
HIP 92425 |
7.23 |
| 2026-06-14 12:00 |
18:49:21.57 |
-42:15:30.3 |
HIP 92425 |
9.13 |
| 2026-06-15 00:00 |
18:49:11.30 |
-42:15:49.5 |
HIP 92264 |
10.83 |
| 2026-06-15 12:00 |
18:49:00.99 |
-42:16:08.3 |
HIP 92264 |
8.94 |
| 2026-06-16 00:00 |
18:48:50.65 |
-42:16:26.8 |
HIP 92264 |
7.06 |
| 2026-06-16 12:00 |
18:48:40.28 |
-42:16:44.8 |
HIP 92264 |
5.22 |
| 2026-06-17 00:00 |
18:48:29.88 |
-42:17:02.4 |
HIP 92264 |
3.48 |
| 2026-06-17 12:00 |
18:48:19.46 |
-42:17:19.6 |
HIP 92264 |
2.12 |
| 2026-06-18 00:00 |
18:48:09.00 |
-42:17:36.4 |
HIP 92264 |
2.13 |
| 2026-06-18 12:00 |
18:47:58.53 |
-42:17:52.8 |
HIP 92264 |
3.48 |
| 2026-06-19 00:00 |
18:47:48.02 |
-42:18:08.8 |
HIP 92264 |
5.24 |
| 2026-06-19 12:00 |
18:47:37.50 |
-42:18:24.4 |
HIP 92264 |
7.10 |
| 2026-06-20 00:00 |
18:47:26.95 |
-42:18:39.5 |
HIP 92264 |
9.01 |
| 2026-06-20 12:00 |
18:47:16.38 |
-42:18:54.3 |
HIP 92264 |
10.94 |
| 2026-06-21 00:00 |
18:47:05.80 |
-42:19:08.6 |
HIP 92110 |
11.90 |
| 2026-06-21 12:00 |
18:46:55.19 |
-42:19:22.5 |
HIP 92110 |
10.42 |
| 2026-06-22 00:00 |
18:46:44.57 |
-42:19:35.9 |
HIP 92110 |
9.12 |