メタデータ
| 項目 |
値 |
| Designation |
P/2024 T1 (Rankin) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-09-30T10:53:27.006720Z |
| Orbit solution date (soln_date, UTC) |
2025-02-20T14:12:25Z |
| Obs used |
158 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-10-02T11:50:41.510400Z |
| Discovery magnitude (MPC) |
19.82 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-11-28.0000000 |
| e |
0.65385983 |
| q (au) |
2.287077 |
| a (au) |
6.607373 |
| i (deg) |
17.619161 |
| Ω (om, deg) |
279.709192 |
| ω (w, deg) |
164.882104 |
| M (ma, deg) |
3.397502 |
等級
散乱 + 全体線形
$$
M_a = (11.595 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.595 |
| n |
6.000 |
| gf |
0.944 |
| gb |
-0.765 |
| k |
0.997 |
| δ90 |
7.868 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:59:09.32 |
-22:12:29.4 |
HIP 63394 |
6.24 |
| 2026-09-20 12:00 |
12:59:32.69 |
-22:14:15.8 |
HIP 63394 |
6.73 |
| 2026-09-21 00:00 |
12:59:56.07 |
-22:16:02.7 |
HIP 63394 |
10.79 |
| 2026-09-21 12:00 |
13:00:19.47 |
-22:17:50.0 |
HIP 63394 |
15.90 |
| 2026-09-22 00:00 |
13:00:42.88 |
-22:19:37.8 |
HIP 63394 |
21.32 |
| 2026-09-22 12:00 |
13:01:06.31 |
-22:21:26.1 |
HIP 63394 |
26.87 |
| 2026-09-23 00:00 |
13:01:29.76 |
-22:23:14.8 |
HIP 63394 |
32.48 |
| 2026-09-23 12:00 |
13:01:53.23 |
-22:25:03.9 |
HIP 63394 |
38.12 |
| 2026-09-24 00:00 |
13:02:16.71 |
-22:26:53.5 |
HIP 63798 |
38.84 |
| 2026-09-24 12:00 |
13:02:40.20 |
-22:28:43.5 |
HIP 63798 |
33.41 |
| 2026-09-25 00:00 |
13:03:03.71 |
-22:30:33.9 |
HIP 63798 |
28.09 |
| 2026-09-25 12:00 |
13:03:27.23 |
-22:32:24.8 |
HIP 63798 |
22.95 |
| 2026-09-26 00:00 |
13:03:50.76 |
-22:34:16.1 |
HIP 63798 |
18.18 |
| 2026-09-26 12:00 |
13:04:14.31 |
-22:36:07.8 |
HIP 63798 |
14.13 |
| 2026-09-27 00:00 |
13:04:37.87 |
-22:38:00.0 |
HIP 63798 |
11.60 |
| 2026-09-27 12:00 |
13:05:01.44 |
-22:39:52.5 |
HIP 63798 |
11.64 |
| 2026-09-28 00:00 |
13:05:25.03 |
-22:41:45.4 |
HIP 63798 |
14.22 |
| 2026-09-28 12:00 |
13:05:48.62 |
-22:43:38.7 |
HIP 63798 |
18.31 |
| 2026-09-29 00:00 |
13:06:12.22 |
-22:45:32.5 |
HIP 63798 |
23.12 |
| 2026-09-29 12:00 |
13:06:35.83 |
-22:47:26.6 |
HIP 63798 |
28.29 |
| 2026-09-30 00:00 |
13:06:59.46 |
-22:49:21.2 |
HIP 64133 |
28.63 |
| 2026-09-30 12:00 |
13:07:23.09 |
-22:51:16.1 |
HIP 64133 |
23.18 |
| 2026-10-01 00:00 |
13:07:46.73 |
-22:53:11.4 |
HIP 64133 |
17.92 |
| 2026-10-01 12:00 |
13:08:10.38 |
-22:55:07.0 |
HIP 64133 |
13.10 |
| 2026-10-02 00:00 |
13:08:34.03 |
-22:57:03.1 |
HIP 64133 |
9.41 |
| 2026-10-02 12:00 |
13:08:57.69 |
-22:58:59.5 |
HIP 64166 |
8.19 |
| 2026-10-03 00:00 |
13:09:21.36 |
-23:00:56.3 |
HIP 64166 |
7.41 |
| 2026-10-03 12:00 |
13:09:45.03 |
-23:02:53.5 |
HIP 64166 |
10.48 |
| 2026-10-04 00:00 |
13:10:08.71 |
-23:04:51.0 |
HIP 64166 |
15.21 |
| 2026-10-04 12:00 |
13:10:32.40 |
-23:06:48.9 |
HIP 64166 |
20.49 |
| 2026-10-05 00:00 |
13:10:56.09 |
-23:08:47.1 |
HIP 64428 |
22.58 |
| 2026-10-05 12:00 |
13:11:19.78 |
-23:10:45.7 |
HIP 64428 |
16.91 |
| 2026-10-06 00:00 |
13:11:43.47 |
-23:12:44.7 |
HIP 64428 |
11.36 |
| 2026-10-06 12:00 |
13:12:07.17 |
-23:14:43.9 |
HIP 64428 |
6.27 |
| 2026-10-07 00:00 |
13:12:30.87 |
-23:16:43.5 |
HIP 64428 |
4.08 |
| 2026-10-07 12:00 |
13:12:54.57 |
-23:18:43.5 |
HIP 64428 |
7.82 |
| 2026-10-08 00:00 |
13:13:18.27 |
-23:20:43.8 |
HIP 64428 |
13.14 |
| 2026-10-08 12:00 |
13:13:41.97 |
-23:22:44.4 |
HIP 64428 |
18.75 |
| 2026-10-09 00:00 |
13:14:05.67 |
-23:24:45.3 |
HIP 64428 |
24.45 |
| 2026-10-09 12:00 |
13:14:29.37 |
-23:26:46.5 |
HIP 64753 |
24.96 |
| 2026-10-10 00:00 |
13:14:53.06 |
-23:28:48.0 |
HIP 64753 |
19.20 |
| 2026-10-10 12:00 |
13:15:16.76 |
-23:30:49.9 |
HIP 64753 |
13.49 |
| 2026-10-11 00:00 |
13:15:40.44 |
-23:32:52.0 |
HIP 64753 |
7.89 |