メタデータ
| 項目 |
値 |
| Designation |
C/2024 G4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-03-21T15:46:15.012480Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:15Z |
| Obs used |
607 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
7.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-10T12:57:43.084800Z |
| Discovery magnitude (MPC) |
21.12 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-03-30.0000000 |
| e |
0.99841066 |
| q (au) |
4.900309 |
| a (au) |
3083.230341 |
| i (deg) |
33.026326 |
| Ω (om, deg) |
152.985109 |
| ω (w, deg) |
131.422951 |
| M (ma, deg) |
359.997947 |
等級
散乱 + 全体線形
$$
M_a = (9.008 + 2.994\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.008 |
| n |
2.994 |
| gf |
1.000 |
| gb |
-0.525 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-06-01 00:00 |
20:22:46.82 |
+04:17:28.5 |
HIP 100459 |
39.32 |
| 2026-06-01 12:00 |
20:22:47.49 |
+04:17:32.7 |
HIP 100459 |
39.28 |
| 2026-06-02 00:00 |
20:22:48.00 |
+04:17:35.6 |
HIP 100459 |
39.25 |
| 2026-06-02 12:00 |
20:22:48.32 |
+04:17:37.1 |
HIP 100459 |
39.24 |
| 2026-06-03 00:00 |
20:22:48.48 |
+04:17:37.1 |
HIP 100459 |
39.25 |
| 2026-06-03 12:00 |
20:22:48.47 |
+04:17:35.8 |
HIP 100459 |
39.27 |
| 2026-06-04 00:00 |
20:22:48.28 |
+04:17:33.1 |
HIP 100459 |
39.31 |
| 2026-06-04 12:00 |
20:22:47.93 |
+04:17:28.9 |
HIP 100459 |
39.36 |
| 2026-06-05 00:00 |
20:22:47.40 |
+04:17:23.3 |
HIP 100459 |
39.43 |
| 2026-06-05 12:00 |
20:22:46.71 |
+04:17:16.3 |
HIP 100285 |
39.43 |
| 2026-06-06 00:00 |
20:22:45.85 |
+04:17:07.8 |
HIP 100285 |
39.17 |
| 2026-06-06 12:00 |
20:22:44.82 |
+04:16:57.9 |
HIP 100285 |
38.87 |
| 2026-06-07 00:00 |
20:22:43.62 |
+04:16:46.4 |
HIP 100285 |
38.52 |
| 2026-06-07 12:00 |
20:22:42.25 |
+04:16:33.5 |
HIP 100285 |
38.12 |
| 2026-06-08 00:00 |
20:22:40.72 |
+04:16:19.1 |
HIP 100285 |
37.67 |
| 2026-06-08 12:00 |
20:22:39.02 |
+04:16:03.2 |
HIP 100285 |
37.17 |
| 2026-06-09 00:00 |
20:22:37.16 |
+04:15:45.8 |
HIP 100285 |
36.62 |
| 2026-06-09 12:00 |
20:22:35.13 |
+04:15:26.8 |
HIP 100285 |
36.03 |
| 2026-06-10 00:00 |
20:22:32.94 |
+04:15:06.4 |
HIP 100285 |
35.39 |
| 2026-06-10 12:00 |
20:22:30.59 |
+04:14:44.3 |
HIP 100285 |
34.70 |
| 2026-06-11 00:00 |
20:22:28.07 |
+04:14:20.7 |
HIP 100285 |
33.96 |
| 2026-06-11 12:00 |
20:22:25.39 |
+04:13:55.6 |
HIP 100285 |
33.17 |
| 2026-06-12 00:00 |
20:22:22.55 |
+04:13:28.9 |
HIP 100285 |
32.34 |
| 2026-06-12 12:00 |
20:22:19.55 |
+04:13:00.6 |
HIP 100285 |
31.46 |
| 2026-06-13 00:00 |
20:22:16.40 |
+04:12:30.7 |
HIP 100285 |
30.54 |
| 2026-06-13 12:00 |
20:22:13.08 |
+04:11:59.2 |
HIP 100285 |
29.56 |
| 2026-06-14 00:00 |
20:22:09.61 |
+04:11:26.1 |
HIP 100285 |
28.54 |
| 2026-06-14 12:00 |
20:22:05.98 |
+04:10:51.4 |
HIP 100285 |
27.48 |
| 2026-06-15 00:00 |
20:22:02.20 |
+04:10:15.0 |
HIP 100285 |
26.37 |
| 2026-06-15 12:00 |
20:21:58.27 |
+04:09:37.1 |
HIP 100285 |
25.21 |
| 2026-06-16 00:00 |
20:21:54.18 |
+04:08:57.5 |
HIP 100285 |
24.01 |
| 2026-06-16 12:00 |
20:21:49.94 |
+04:08:16.2 |
HIP 100285 |
22.76 |
| 2026-06-17 00:00 |
20:21:45.56 |
+04:07:33.3 |
HIP 100285 |
21.47 |
| 2026-06-17 12:00 |
20:21:41.03 |
+04:06:48.7 |
HIP 100285 |
20.14 |
| 2026-06-18 00:00 |
20:21:36.35 |
+04:06:02.5 |
HIP 100285 |
18.77 |
| 2026-06-18 12:00 |
20:21:31.52 |
+04:05:14.6 |
HIP 100285 |
17.36 |
| 2026-06-19 00:00 |
20:21:26.55 |
+04:04:25.1 |
HIP 100285 |
15.91 |
| 2026-06-19 12:00 |
20:21:21.44 |
+04:03:33.9 |
HIP 100285 |
14.43 |
| 2026-06-20 00:00 |
20:21:16.19 |
+04:02:41.0 |
HIP 100285 |
12.91 |
| 2026-06-20 12:00 |
20:21:10.80 |
+04:01:46.4 |
HIP 100285 |
11.38 |
| 2026-06-21 00:00 |
20:21:05.27 |
+04:00:50.1 |
HIP 100285 |
9.83 |
| 2026-06-21 12:00 |
20:20:59.61 |
+03:59:52.1 |
HIP 100285 |
8.29 |
| 2026-06-22 00:00 |
20:20:53.81 |
+03:58:52.5 |
HIP 100285 |
6.80 |