メタデータ
| 項目 |
値 |
| Designation |
C/2021 N3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-08-19T14:19:37.767360Z |
| Orbit solution date (soln_date, UTC) |
2022-12-28T10:18:08Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-07-13T12:22:01.401600Z |
| Discovery magnitude (MPC) |
20.56 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-04-13.0000000 |
| e |
0.96427540 |
| q (au) |
5.711157 |
| a (au) |
159.866205 |
| i (deg) |
26.748126 |
| Ω (om, deg) |
337.494113 |
| ω (w, deg) |
304.695943 |
| M (ma, deg) |
0.293248 |
等級
散乱 + 全体線形
$$
M_a = (4.887 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.887 |
| n |
6.000 |
| gf |
0.872 |
| gb |
-0.960 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
00:57:30.44 |
+25:54:04.9 |
HIP 4602 |
21.44 |
| 2026-05-12 12:00 |
00:57:38.46 |
+25:55:21.2 |
HIP 4602 |
19.31 |
| 2026-05-13 00:00 |
00:57:46.44 |
+25:56:37.7 |
HIP 4602 |
17.20 |
| 2026-05-13 12:00 |
00:57:54.39 |
+25:57:54.2 |
HIP 4602 |
15.12 |
| 2026-05-14 00:00 |
00:58:02.30 |
+25:59:10.7 |
HIP 4602 |
13.10 |
| 2026-05-14 12:00 |
00:58:10.18 |
+26:00:27.2 |
HIP 4602 |
11.14 |
| 2026-05-15 00:00 |
00:58:18.01 |
+26:01:43.8 |
HIP 4602 |
9.30 |
| 2026-05-15 12:00 |
00:58:25.81 |
+26:03:00.5 |
HIP 4602 |
7.64 |
| 2026-05-16 00:00 |
00:58:33.58 |
+26:04:17.1 |
HIP 4602 |
6.30 |
| 2026-05-16 12:00 |
00:58:41.30 |
+26:05:33.8 |
HIP 4602 |
5.53 |
| 2026-05-17 00:00 |
00:58:48.98 |
+26:06:50.6 |
HIP 4602 |
5.54 |
| 2026-05-17 12:00 |
00:58:56.63 |
+26:08:07.3 |
HIP 4602 |
6.33 |
| 2026-05-18 00:00 |
00:59:04.23 |
+26:09:24.0 |
HIP 4602 |
7.66 |
| 2026-05-18 12:00 |
00:59:11.80 |
+26:10:40.8 |
HIP 4602 |
9.29 |
| 2026-05-19 00:00 |
00:59:19.32 |
+26:11:57.6 |
HIP 4602 |
11.08 |
| 2026-05-19 12:00 |
00:59:26.80 |
+26:13:14.4 |
HIP 4602 |
12.97 |
| 2026-05-20 00:00 |
00:59:34.24 |
+26:14:31.2 |
HIP 4602 |
14.91 |
| 2026-05-20 12:00 |
00:59:41.64 |
+26:15:48.0 |
HIP 4602 |
16.89 |
| 2026-05-21 00:00 |
00:59:49.00 |
+26:17:04.8 |
HIP 4602 |
18.89 |
| 2026-05-21 12:00 |
00:59:56.32 |
+26:18:21.6 |
HIP 4761 |
19.45 |
| 2026-05-22 00:00 |
01:00:03.59 |
+26:19:38.3 |
HIP 4761 |
17.40 |
| 2026-05-22 12:00 |
01:00:10.82 |
+26:20:55.1 |
HIP 4761 |
15.35 |
| 2026-05-23 00:00 |
01:00:18.00 |
+26:22:11.9 |
HIP 4761 |
13.33 |
| 2026-05-23 12:00 |
01:00:25.14 |
+26:23:28.6 |
HIP 4761 |
11.33 |
| 2026-05-24 00:00 |
01:00:32.24 |
+26:24:45.3 |
HIP 4761 |
9.35 |
| 2026-05-24 12:00 |
01:00:39.29 |
+26:26:02.0 |
HIP 4761 |
7.42 |
| 2026-05-25 00:00 |
01:00:46.30 |
+26:27:18.7 |
HIP 4761 |
5.58 |
| 2026-05-25 12:00 |
01:00:53.26 |
+26:28:35.3 |
HIP 4761 |
3.92 |
| 2026-05-26 00:00 |
01:01:00.18 |
+26:29:51.9 |
HIP 4761 |
2.79 |
| 2026-05-26 12:00 |
01:01:07.05 |
+26:31:08.5 |
HIP 4761 |
2.88 |
| 2026-05-27 00:00 |
01:01:13.88 |
+26:32:25.0 |
HIP 4761 |
4.10 |
| 2026-05-27 12:00 |
01:01:20.65 |
+26:33:41.6 |
HIP 4761 |
5.76 |
| 2026-05-28 00:00 |
01:01:27.39 |
+26:34:58.0 |
HIP 4761 |
7.57 |
| 2026-05-28 12:00 |
01:01:34.07 |
+26:36:14.4 |
HIP 4761 |
9.43 |
| 2026-05-29 00:00 |
01:01:40.71 |
+26:37:30.8 |
HIP 4761 |
11.33 |
| 2026-05-29 12:00 |
01:01:47.30 |
+26:38:47.1 |
HIP 4761 |
13.23 |
| 2026-05-30 00:00 |
01:01:53.84 |
+26:40:03.4 |
HIP 4761 |
15.14 |
| 2026-05-30 12:00 |
01:02:00.33 |
+26:41:19.6 |
HIP 4761 |
17.04 |
| 2026-05-31 00:00 |
01:02:06.77 |
+26:42:35.7 |
HIP 4761 |
18.95 |
| 2026-05-31 12:00 |
01:02:13.17 |
+26:43:51.8 |
HIP 4761 |
20.84 |
| 2026-06-01 00:00 |
01:02:19.51 |
+26:45:07.9 |
HIP 4761 |
22.73 |
| 2026-06-01 12:00 |
01:02:25.81 |
+26:46:23.8 |
HIP 4761 |
24.62 |
| 2026-06-02 00:00 |
01:02:32.06 |
+26:47:39.7 |
HIP 5007 |
24.62 |