| Parameter |
Value |
| Designation |
229P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-05-20T22:45:24.773760Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:41Z |
| Obs used |
293 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
9.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-10-15.0000000 |
| e |
0.37605919 |
| q (au) |
2.454753 |
| a (au) |
3.934273 |
| i (deg) |
26.069392 |
| Ω (om, deg) |
157.911010 |
| ω (w, deg) |
224.219557 |
| M (ma, deg) |
286.246652 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.599 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.599 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.822 |
| k |
0.997 |
| δ90 |
9.926 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:44:29.70 |
+05:43:57.8 |
HIP 47639 |
26.27 |
| 2026-09-20 12:00 |
09:44:59.38 |
+05:42:10.4 |
HIP 47639 |
33.87 |
| 2026-09-21 00:00 |
09:45:28.98 |
+05:40:22.9 |
HIP 48044 |
32.73 |
| 2026-09-21 12:00 |
09:45:58.50 |
+05:38:35.5 |
HIP 48044 |
25.17 |
| 2026-09-22 00:00 |
09:46:27.93 |
+05:36:48.0 |
HIP 48044 |
17.64 |
| 2026-09-22 12:00 |
09:46:57.29 |
+05:35:00.6 |
HIP 48044 |
10.14 |
| 2026-09-23 00:00 |
09:47:26.56 |
+05:33:13.3 |
HIP 48044 |
2.78 |
| 2026-09-23 12:00 |
09:47:55.74 |
+05:31:26.0 |
HIP 48044 |
4.98 |
| 2026-09-24 00:00 |
09:48:24.84 |
+05:29:38.7 |
HIP 48044 |
12.38 |
| 2026-09-24 12:00 |
09:48:53.85 |
+05:27:51.5 |
HIP 48044 |
19.80 |
| 2026-09-25 00:00 |
09:49:22.78 |
+05:26:04.4 |
HIP 48261 |
18.88 |
| 2026-09-25 12:00 |
09:49:51.62 |
+05:24:17.3 |
HIP 48261 |
12.89 |
| 2026-09-26 00:00 |
09:50:20.38 |
+05:22:30.3 |
HIP 48261 |
9.22 |
| 2026-09-26 12:00 |
09:50:49.04 |
+05:20:43.4 |
HIP 48261 |
10.61 |
| 2026-09-27 00:00 |
09:51:17.62 |
+05:18:56.6 |
HIP 48261 |
15.74 |
| 2026-09-27 12:00 |
09:51:46.11 |
+05:17:09.9 |
HIP 48261 |
22.12 |
| 2026-09-28 00:00 |
09:52:14.51 |
+05:15:23.3 |
HIP 48295 |
27.02 |
| 2026-09-28 12:00 |
09:52:42.83 |
+05:13:36.8 |
HIP 48552 |
26.86 |
| 2026-09-29 00:00 |
09:53:11.05 |
+05:11:50.4 |
HIP 48552 |
20.51 |
| 2026-09-29 12:00 |
09:53:39.18 |
+05:10:04.1 |
HIP 48552 |
15.01 |
| 2026-09-30 00:00 |
09:54:07.22 |
+05:08:18.0 |
HIP 48552 |
11.58 |
| 2026-09-30 12:00 |
09:54:35.17 |
+05:06:32.0 |
HIP 48552 |
12.10 |
| 2026-10-01 00:00 |
09:55:03.02 |
+05:04:46.2 |
HIP 48552 |
16.17 |
| 2026-10-01 12:00 |
09:55:30.78 |
+05:03:00.5 |
HIP 48552 |
21.86 |
| 2026-10-02 00:00 |
09:55:58.45 |
+05:01:15.0 |
HIP 48820 |
23.38 |
| 2026-10-02 12:00 |
09:56:26.02 |
+04:59:29.7 |
HIP 48820 |
17.33 |
| 2026-10-03 00:00 |
09:56:53.50 |
+04:57:44.5 |
HIP 48820 |
12.46 |
| 2026-10-03 12:00 |
09:57:20.88 |
+04:55:59.5 |
HIP 48820 |
10.47 |
| 2026-10-04 00:00 |
09:57:48.17 |
+04:54:14.7 |
HIP 48820 |
12.77 |
| 2026-10-04 12:00 |
09:58:15.36 |
+04:52:30.1 |
HIP 48923 |
9.23 |
| 2026-10-05 00:00 |
09:58:42.44 |
+04:50:45.8 |
HIP 48923 |
2.74 |
| 2026-10-05 12:00 |
09:59:09.43 |
+04:49:01.6 |
HIP 48923 |
5.17 |
| 2026-10-06 00:00 |
09:59:36.32 |
+04:47:17.7 |
HIP 48923 |
11.91 |
| 2026-10-06 12:00 |
10:00:03.11 |
+04:45:34.0 |
HIP 48923 |
18.76 |
| 2026-10-07 00:00 |
10:00:29.80 |
+04:43:50.6 |
HIP 49074 |
17.35 |
| 2026-10-07 12:00 |
10:00:56.38 |
+04:42:07.4 |
HIP 49074 |
17.60 |
| 2026-10-08 00:00 |
10:01:22.86 |
+04:40:24.5 |
HIP 49074 |
20.29 |
| 2026-10-08 12:00 |
10:01:49.24 |
+04:38:41.9 |
HIP 49254 |
21.59 |
| 2026-10-09 00:00 |
10:02:15.51 |
+04:36:59.5 |
HIP 49254 |
15.28 |
| 2026-10-09 12:00 |
10:02:41.68 |
+04:35:17.5 |
HIP 49254 |
9.63 |
| 2026-10-10 00:00 |
10:03:07.74 |
+04:33:35.7 |
HIP 49254 |
6.54 |
| 2026-10-10 12:00 |
10:03:33.69 |
+04:31:54.3 |
HIP 49254 |
9.10 |
| 2026-10-11 00:00 |
10:03:59.53 |
+04:30:13.2 |
HIP 49254 |
14.54 |