メタデータ
| 項目 |
値 |
| Designation |
C/2023 S3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-01-19T14:58:00.491520Z |
| Orbit solution date (soln_date, UTC) |
2024-08-02T01:42:20Z |
| Obs used |
692 |
| NEO |
Yes |
| M1 |
16.300 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-09-25T10:53:32.726400Z |
| Discovery magnitude (MPC) |
19.99 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-12-22.0000000 |
| e |
0.97084030 |
| q (au) |
0.830157 |
| a (au) |
28.469320 |
| i (deg) |
140.498019 |
| Ω (om, deg) |
233.833529 |
| ω (w, deg) |
281.571309 |
| M (ma, deg) |
359.814278 |
等級
散乱 + 全体線形
$$
M_a = (15.227 + 4.398\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.227 |
| n |
4.398 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-09-25 |
2023-11-18 |
-4.1066 |
+1.202 |
| 2023-11-18 |
2024-01-09 |
+21.3814 |
-2.097 |
| 2024-02-11 |
2024-03-09 |
+21.5517 |
-3.253 |
| 2024-03-09 |
2024-06-02 |
+1.1889 |
-1.105 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
12:40:20.49 |
+40:18:40.8 |
HIP 61854 |
3.52 |
| 2026-03-26 12:00 |
12:39:59.60 |
+40:20:22.4 |
HIP 61854 |
7.85 |
| 2026-03-27 00:00 |
12:39:38.72 |
+40:22:02.3 |
HIP 61854 |
12.16 |
| 2026-03-27 12:00 |
12:39:17.83 |
+40:23:40.4 |
HIP 61854 |
16.46 |
| 2026-03-28 00:00 |
12:38:56.94 |
+40:25:16.8 |
HIP 61707 |
18.85 |
| 2026-03-28 12:00 |
12:38:36.06 |
+40:26:51.4 |
HIP 61707 |
20.68 |
| 2026-03-29 00:00 |
12:38:15.18 |
+40:28:24.3 |
HIP 61707 |
23.14 |
| 2026-03-29 12:00 |
12:37:54.32 |
+40:29:55.4 |
HIP 61514 |
20.07 |
| 2026-03-30 00:00 |
12:37:33.47 |
+40:31:24.8 |
HIP 61514 |
15.86 |
| 2026-03-30 12:00 |
12:37:12.62 |
+40:32:52.5 |
HIP 61514 |
11.67 |
| 2026-03-31 00:00 |
12:36:51.80 |
+40:34:18.3 |
HIP 61514 |
7.53 |
| 2026-03-31 12:00 |
12:36:30.99 |
+40:35:42.5 |
HIP 61514 |
3.57 |
| 2026-04-01 00:00 |
12:36:10.20 |
+40:37:04.8 |
HIP 61514 |
1.94 |
| 2026-04-01 12:00 |
12:35:49.44 |
+40:38:25.4 |
HIP 61514 |
5.43 |
| 2026-04-02 00:00 |
12:35:28.70 |
+40:39:44.3 |
HIP 61514 |
9.46 |
| 2026-04-02 12:00 |
12:35:07.98 |
+40:41:01.4 |
HIP 61370 |
10.63 |
| 2026-04-03 00:00 |
12:34:47.30 |
+40:42:16.7 |
HIP 61370 |
10.16 |
| 2026-04-03 12:00 |
12:34:26.64 |
+40:43:30.3 |
HIP 61370 |
11.27 |
| 2026-04-04 00:00 |
12:34:06.02 |
+40:44:42.1 |
HIP 61277 |
7.49 |
| 2026-04-04 12:00 |
12:33:45.43 |
+40:45:52.1 |
HIP 61277 |
4.15 |
| 2026-04-05 00:00 |
12:33:24.88 |
+40:47:00.4 |
HIP 61277 |
3.37 |
| 2026-04-05 12:00 |
12:33:04.37 |
+40:48:06.9 |
HIP 61277 |
6.17 |
| 2026-04-06 00:00 |
12:32:43.90 |
+40:49:11.7 |
HIP 61277 |
9.84 |
| 2026-04-06 12:00 |
12:32:23.47 |
+40:50:14.7 |
HIP 61277 |
13.69 |
| 2026-04-07 00:00 |
12:32:03.08 |
+40:51:15.9 |
HIP 61277 |
17.59 |
| 2026-04-07 12:00 |
12:31:42.75 |
+40:52:15.4 |
HIP 61021 |
15.69 |
| 2026-04-08 00:00 |
12:31:22.46 |
+40:53:13.2 |
HIP 61021 |
12.15 |
| 2026-04-08 12:00 |
12:31:02.23 |
+40:54:09.1 |
HIP 61021 |
8.95 |
| 2026-04-09 00:00 |
12:30:42.04 |
+40:55:03.4 |
HIP 61021 |
6.60 |
| 2026-04-09 12:00 |
12:30:21.92 |
+40:55:55.8 |
HIP 61021 |
6.11 |
| 2026-04-10 00:00 |
12:30:01.85 |
+40:56:46.5 |
HIP 61021 |
7.82 |
| 2026-04-10 12:00 |
12:29:41.84 |
+40:57:35.5 |
HIP 61021 |
10.70 |
| 2026-04-11 00:00 |
12:29:21.89 |
+40:58:22.8 |
HIP 61021 |
14.03 |
| 2026-04-11 12:00 |
12:29:02.01 |
+40:59:08.2 |
HIP 61021 |
17.56 |
| 2026-04-12 00:00 |
12:28:42.19 |
+40:59:52.0 |
HIP 61021 |
21.16 |
| 2026-04-12 12:00 |
12:28:22.43 |
+41:00:34.0 |
HIP 60791 |
22.72 |
| 2026-04-13 00:00 |
12:28:02.75 |
+41:01:14.3 |
HIP 60791 |
20.83 |
| 2026-04-13 12:00 |
12:27:43.14 |
+41:01:52.9 |
HIP 60791 |
19.51 |
| 2026-04-14 00:00 |
12:27:23.60 |
+41:02:29.7 |
HIP 60791 |
18.90 |
| 2026-04-14 12:00 |
12:27:04.14 |
+41:03:04.8 |
HIP 60791 |
19.02 |
| 2026-04-15 00:00 |
12:26:44.75 |
+41:03:38.2 |
HIP 60791 |
19.88 |
| 2026-04-15 12:00 |
12:26:25.44 |
+41:04:09.9 |
HIP 60791 |
21.35 |
| 2026-04-16 00:00 |
12:26:06.22 |
+41:04:39.9 |
HIP 60539 |
22.54 |