| 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) |
| 2026-03-26 00:00 |
19:01:11.41 |
-40:41:11.1 |
HIP 93458 |
9.65 |
| 2026-03-26 12:00 |
19:01:14.48 |
-40:41:45.3 |
HIP 93458 |
9.18 |
| 2026-03-27 00:00 |
19:01:17.46 |
-40:42:19.7 |
HIP 93458 |
8.78 |
| 2026-03-27 12:00 |
19:01:20.34 |
-40:42:54.2 |
HIP 93458 |
8.45 |
| 2026-03-28 00:00 |
19:01:23.12 |
-40:43:28.9 |
HIP 93458 |
8.21 |
| 2026-03-28 12:00 |
19:01:25.81 |
-40:44:03.9 |
HIP 93458 |
8.05 |
| 2026-03-29 00:00 |
19:01:28.40 |
-40:44:38.9 |
HIP 93458 |
7.99 |
| 2026-03-29 12:00 |
19:01:30.89 |
-40:45:14.2 |
HIP 93458 |
8.01 |
| 2026-03-30 00:00 |
19:01:33.29 |
-40:45:49.6 |
HIP 93458 |
8.11 |
| 2026-03-30 12:00 |
19:01:35.58 |
-40:46:25.2 |
HIP 93458 |
8.30 |
| 2026-03-31 00:00 |
19:01:37.78 |
-40:47:01.0 |
HIP 93458 |
8.55 |
| 2026-03-31 12:00 |
19:01:39.88 |
-40:47:36.9 |
HIP 93458 |
8.88 |
| 2026-04-01 00:00 |
19:01:41.89 |
-40:48:13.0 |
HIP 93458 |
9.25 |
| 2026-04-01 12:00 |
19:01:43.79 |
-40:48:49.3 |
HIP 93458 |
9.67 |
| 2026-04-02 00:00 |
19:01:45.60 |
-40:49:25.7 |
HIP 93458 |
10.14 |
| 2026-04-02 12:00 |
19:01:47.30 |
-40:50:02.3 |
HIP 93458 |
10.63 |
| 2026-04-03 00:00 |
19:01:48.91 |
-40:50:39.0 |
HIP 93458 |
11.15 |
| 2026-04-03 12:00 |
19:01:50.42 |
-40:51:15.9 |
HIP 93458 |
11.70 |
| 2026-04-04 00:00 |
19:01:51.83 |
-40:51:52.9 |
HIP 93458 |
12.26 |
| 2026-04-04 12:00 |
19:01:53.15 |
-40:52:30.1 |
HIP 93458 |
12.84 |
| 2026-04-05 00:00 |
19:01:54.36 |
-40:53:07.4 |
HIP 93458 |
13.43 |
| 2026-04-05 12:00 |
19:01:55.47 |
-40:53:44.8 |
HIP 93458 |
14.03 |
| 2026-04-06 00:00 |
19:01:56.48 |
-40:54:22.4 |
HIP 93458 |
14.64 |
| 2026-04-06 12:00 |
19:01:57.40 |
-40:55:00.1 |
HIP 93458 |
15.26 |
| 2026-04-07 00:00 |
19:01:58.21 |
-40:55:38.0 |
HIP 93458 |
15.88 |
| 2026-04-07 12:00 |
19:01:58.92 |
-40:56:16.0 |
HIP 93458 |
16.51 |
| 2026-04-08 00:00 |
19:01:59.53 |
-40:56:54.1 |
HIP 93458 |
17.14 |
| 2026-04-08 12:00 |
19:02:00.05 |
-40:57:32.3 |
HIP 93458 |
17.78 |
| 2026-04-09 00:00 |
19:02:00.46 |
-40:58:10.7 |
HIP 93458 |
18.41 |
| 2026-04-09 12:00 |
19:02:00.77 |
-40:58:49.1 |
HIP 93495 |
18.14 |
| 2026-04-10 00:00 |
19:02:00.98 |
-40:59:27.7 |
HIP 93495 |
17.50 |
| 2026-04-10 12:00 |
19:02:01.09 |
-41:00:06.4 |
HIP 93495 |
16.88 |
| 2026-04-11 00:00 |
19:02:01.10 |
-41:00:45.2 |
HIP 93495 |
16.26 |
| 2026-04-11 12:00 |
19:02:01.01 |
-41:01:24.1 |
HIP 93495 |
15.64 |
| 2026-04-12 00:00 |
19:02:00.81 |
-41:02:03.1 |
HIP 93495 |
15.03 |
| 2026-04-12 12:00 |
19:02:00.52 |
-41:02:42.3 |
HIP 93495 |
14.43 |
| 2026-04-13 00:00 |
19:02:00.12 |
-41:03:21.5 |
HIP 93495 |
13.85 |
| 2026-04-13 12:00 |
19:01:59.62 |
-41:04:00.8 |
HIP 93495 |
13.27 |
| 2026-04-14 00:00 |
19:01:59.02 |
-41:04:40.2 |
HIP 93495 |
12.71 |
| 2026-04-14 12:00 |
19:01:58.32 |
-41:05:19.6 |
HIP 93495 |
12.16 |
| 2026-04-15 00:00 |
19:01:57.52 |
-41:05:59.2 |
HIP 93495 |
11.63 |
| 2026-04-15 12:00 |
19:01:56.62 |
-41:06:38.8 |
HIP 93495 |
11.13 |
| 2026-04-16 00:00 |
19:01:55.61 |
-41:07:18.5 |
HIP 93495 |
10.66 |