| Parameter |
Value |
| Designation |
P/2023 Y1 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-11-29T17:56:43.405440Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:28Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
16.500 |
| K1 |
8.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-02-05.0000000 |
| e |
0.44505354 |
| q (au) |
2.079783 |
| a (au) |
3.747719 |
| i (deg) |
6.384063 |
| Ω (om, deg) |
78.857594 |
| ω (w, deg) |
51.430701 |
| M (ma, deg) |
9.136095 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.789 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.789 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.929 |
| 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) |
| 2026-06-01 00:00 |
19:41:08.85 |
-24:48:18.1 |
HIP 96879 |
6.35 |
| 2026-06-01 12:00 |
19:40:57.21 |
-24:49:15.1 |
HIP 96879 |
8.74 |
| 2026-06-02 00:00 |
19:40:45.37 |
-24:50:12.5 |
HIP 96879 |
11.37 |
| 2026-06-02 12:00 |
19:40:33.33 |
-24:51:10.1 |
HIP 96879 |
14.13 |
| 2026-06-03 00:00 |
19:40:21.10 |
-24:52:08.1 |
HIP 96879 |
16.98 |
| 2026-06-03 12:00 |
19:40:08.67 |
-24:53:06.3 |
HIP 96707 |
19.67 |
| 2026-06-04 00:00 |
19:39:56.05 |
-24:54:04.8 |
HIP 96707 |
19.67 |
| 2026-06-04 12:00 |
19:39:43.25 |
-24:55:03.6 |
HIP 96707 |
20.13 |
| 2026-06-05 00:00 |
19:39:30.25 |
-24:56:02.6 |
HIP 96707 |
21.04 |
| 2026-06-05 12:00 |
19:39:17.06 |
-24:57:01.8 |
HIP 96707 |
22.37 |
| 2026-06-06 00:00 |
19:39:03.69 |
-24:58:01.3 |
HIP 96707 |
24.05 |
| 2026-06-06 12:00 |
19:38:50.13 |
-24:59:01.0 |
HIP 96494 |
25.16 |
| 2026-06-07 00:00 |
19:38:36.39 |
-25:00:01.0 |
HIP 96494 |
21.90 |
| 2026-06-07 12:00 |
19:38:22.46 |
-25:01:01.1 |
HIP 96494 |
18.61 |
| 2026-06-08 00:00 |
19:38:08.35 |
-25:02:01.5 |
HIP 96494 |
15.28 |
| 2026-06-08 12:00 |
19:37:54.07 |
-25:03:02.0 |
HIP 96494 |
11.92 |
| 2026-06-09 00:00 |
19:37:39.61 |
-25:04:02.7 |
HIP 96494 |
8.55 |
| 2026-06-09 12:00 |
19:37:24.97 |
-25:05:03.6 |
HIP 96494 |
5.20 |
| 2026-06-10 00:00 |
19:37:10.16 |
-25:06:04.7 |
HIP 96494 |
2.24 |
| 2026-06-10 12:00 |
19:36:55.18 |
-25:07:05.9 |
HIP 96494 |
2.77 |
| 2026-06-11 00:00 |
19:36:40.02 |
-25:08:07.2 |
HIP 96494 |
5.98 |
| 2026-06-11 12:00 |
19:36:24.70 |
-25:09:08.7 |
HIP 96494 |
9.50 |
| 2026-06-12 00:00 |
19:36:09.21 |
-25:10:10.3 |
HIP 96494 |
13.10 |
| 2026-06-12 12:00 |
19:35:53.56 |
-25:11:12.0 |
HIP 96333 |
10.43 |
| 2026-06-13 00:00 |
19:35:37.75 |
-25:12:13.8 |
HIP 96333 |
7.62 |
| 2026-06-13 12:00 |
19:35:21.78 |
-25:13:15.6 |
HIP 96333 |
5.91 |
| 2026-06-14 00:00 |
19:35:05.65 |
-25:14:17.6 |
HIP 96333 |
6.34 |
| 2026-06-14 12:00 |
19:34:49.36 |
-25:15:19.6 |
HIP 96333 |
8.64 |
| 2026-06-15 00:00 |
19:34:32.92 |
-25:16:21.7 |
HIP 96333 |
11.78 |
| 2026-06-15 12:00 |
19:34:16.34 |
-25:17:23.8 |
HIP 96333 |
15.28 |
| 2026-06-16 00:00 |
19:33:59.60 |
-25:18:26.0 |
HIP 96333 |
18.97 |
| 2026-06-16 12:00 |
19:33:42.72 |
-25:19:28.1 |
HIP 96333 |
22.76 |
| 2026-06-17 00:00 |
19:33:25.70 |
-25:20:30.3 |
HIP 96082 |
19.58 |
| 2026-06-17 12:00 |
19:33:08.54 |
-25:21:32.5 |
HIP 96082 |
15.62 |
| 2026-06-18 00:00 |
19:32:51.24 |
-25:22:34.6 |
HIP 96082 |
11.66 |
| 2026-06-18 12:00 |
19:32:33.80 |
-25:23:36.8 |
HIP 96082 |
7.76 |
| 2026-06-19 00:00 |
19:32:16.24 |
-25:24:38.9 |
HIP 96082 |
4.18 |
| 2026-06-19 12:00 |
19:31:58.54 |
-25:25:40.9 |
HIP 96082 |
2.90 |
| 2026-06-20 00:00 |
19:31:40.72 |
-25:26:42.9 |
HIP 96082 |
5.81 |
| 2026-06-20 12:00 |
19:31:22.78 |
-25:27:44.8 |
HIP 95971 |
7.13 |
| 2026-06-21 00:00 |
19:31:04.72 |
-25:28:46.6 |
HIP 95971 |
3.64 |
| 2026-06-21 12:00 |
19:30:46.54 |
-25:29:48.4 |
HIP 95971 |
3.35 |
| 2026-06-22 00:00 |
19:30:28.24 |
-25:30:50.0 |
HIP 95971 |
6.73 |