メタデータ
| 項目 |
値 |
| Designation |
C/2022 P3 (ZTF) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-07-27T08:05:13.447680Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:32Z |
| Obs used |
327 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-08-02T11:44:20.832000Z |
| Discovery magnitude (MPC) |
19.41 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-10-21.0000000 |
| e |
0.98947115 |
| q (au) |
2.561259 |
| a (au) |
243.261099 |
| i (deg) |
59.518749 |
| Ω (om, deg) |
72.234767 |
| ω (w, deg) |
0.090034 |
| M (ma, deg) |
0.022253 |
等級
散乱 + 全体線形
$$
M_a = (13.366 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.366 |
| n |
2.000 |
| gf |
0.995 |
| gb |
-0.998 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:16:54.15 |
+33:03:58.7 |
HIP 74674 |
22.04 |
| 2026-05-12 12:00 |
15:16:42.82 |
+33:03:54.7 |
HIP 74674 |
20.45 |
| 2026-05-13 00:00 |
15:16:31.49 |
+33:03:49.5 |
HIP 74674 |
19.04 |
| 2026-05-13 12:00 |
15:16:20.18 |
+33:03:43.2 |
HIP 74674 |
17.85 |
| 2026-05-14 00:00 |
15:16:08.88 |
+33:03:35.8 |
HIP 74674 |
16.93 |
| 2026-05-14 12:00 |
15:15:57.59 |
+33:03:27.3 |
HIP 74674 |
16.32 |
| 2026-05-15 00:00 |
15:15:46.32 |
+33:03:17.6 |
HIP 74666 |
15.98 |
| 2026-05-15 12:00 |
15:15:35.06 |
+33:03:06.8 |
HIP 74588 |
14.64 |
| 2026-05-16 00:00 |
15:15:23.81 |
+33:02:54.9 |
HIP 74588 |
12.29 |
| 2026-05-16 12:00 |
15:15:12.59 |
+33:02:41.8 |
HIP 74588 |
9.94 |
| 2026-05-17 00:00 |
15:15:01.38 |
+33:02:27.6 |
HIP 74588 |
7.59 |
| 2026-05-17 12:00 |
15:14:50.19 |
+33:02:12.2 |
HIP 74588 |
5.26 |
| 2026-05-18 00:00 |
15:14:39.03 |
+33:01:55.8 |
HIP 74588 |
2.97 |
| 2026-05-18 12:00 |
15:14:27.88 |
+33:01:38.2 |
HIP 74588 |
1.03 |
| 2026-05-19 00:00 |
15:14:16.76 |
+33:01:19.5 |
HIP 74588 |
2.08 |
| 2026-05-19 12:00 |
15:14:05.66 |
+33:00:59.6 |
HIP 74588 |
4.31 |
| 2026-05-20 00:00 |
15:13:54.59 |
+33:00:38.7 |
HIP 74588 |
6.62 |
| 2026-05-20 12:00 |
15:13:43.55 |
+33:00:16.6 |
HIP 74588 |
8.95 |
| 2026-05-21 00:00 |
15:13:32.53 |
+32:59:53.4 |
HIP 74588 |
11.27 |
| 2026-05-21 12:00 |
15:13:21.55 |
+32:59:29.0 |
HIP 74588 |
13.60 |
| 2026-05-22 00:00 |
15:13:10.59 |
+32:59:03.6 |
HIP 74588 |
15.93 |
| 2026-05-22 12:00 |
15:12:59.67 |
+32:58:37.1 |
HIP 74588 |
18.26 |
| 2026-05-23 00:00 |
15:12:48.77 |
+32:58:09.4 |
HIP 74588 |
20.58 |
| 2026-05-23 12:00 |
15:12:37.91 |
+32:57:40.7 |
HIP 74547 |
22.75 |
| 2026-05-24 00:00 |
15:12:27.09 |
+32:57:10.8 |
HIP 74277 |
21.26 |
| 2026-05-24 12:00 |
15:12:16.30 |
+32:56:39.9 |
HIP 74277 |
19.19 |
| 2026-05-25 00:00 |
15:12:05.54 |
+32:56:07.8 |
HIP 74277 |
17.20 |
| 2026-05-25 12:00 |
15:11:54.83 |
+32:55:34.7 |
HIP 74277 |
15.31 |
| 2026-05-26 00:00 |
15:11:44.15 |
+32:55:00.5 |
HIP 74277 |
13.57 |
| 2026-05-26 12:00 |
15:11:33.51 |
+32:54:25.2 |
HIP 74277 |
12.05 |
| 2026-05-27 00:00 |
15:11:22.91 |
+32:53:48.8 |
HIP 74277 |
10.82 |
| 2026-05-27 12:00 |
15:11:12.35 |
+32:53:11.4 |
HIP 74277 |
10.01 |
| 2026-05-28 00:00 |
15:11:01.83 |
+32:52:32.8 |
HIP 74277 |
9.70 |
| 2026-05-28 12:00 |
15:10:51.36 |
+32:51:53.3 |
HIP 74277 |
9.95 |
| 2026-05-29 00:00 |
15:10:40.93 |
+32:51:12.6 |
HIP 74277 |
10.71 |
| 2026-05-29 12:00 |
15:10:30.55 |
+32:50:30.9 |
HIP 74277 |
11.89 |
| 2026-05-30 00:00 |
15:10:20.21 |
+32:49:48.1 |
HIP 74277 |
13.37 |
| 2026-05-30 12:00 |
15:10:09.91 |
+32:49:04.3 |
HIP 74277 |
15.06 |
| 2026-05-31 00:00 |
15:09:59.67 |
+32:48:19.5 |
HIP 74277 |
16.90 |
| 2026-05-31 12:00 |
15:09:49.47 |
+32:47:33.6 |
HIP 74158 |
18.09 |
| 2026-06-01 00:00 |
15:09:39.32 |
+32:46:46.6 |
HIP 74158 |
17.95 |
| 2026-06-01 12:00 |
15:09:29.23 |
+32:45:58.6 |
HIP 74158 |
18.12 |
| 2026-06-02 00:00 |
15:09:19.18 |
+32:45:09.6 |
HIP 74158 |
18.57 |