メタデータ
| 項目 |
値 |
| Designation |
C/2023 RN3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-18T00:08:18.320640Z |
| Orbit solution date (soln_date, UTC) |
2025-09-16T12:42:50Z |
| Obs used |
637 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
11.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-11-02.0000000 |
| e |
0.49041086 |
| q (au) |
5.172310 |
| a (au) |
10.149962 |
| i (deg) |
10.358010 |
| Ω (om, deg) |
207.067405 |
| ω (w, deg) |
130.302280 |
| M (ma, deg) |
8.777913 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-07-29 00:00 |
05:06:09.17 |
+16:04:51.0 |
HIP 23651 |
18.16 |
| 2026-07-29 12:00 |
05:06:23.09 |
+16:04:43.0 |
HIP 23847 |
18.86 |
| 2026-07-30 00:00 |
05:06:36.94 |
+16:04:34.7 |
HIP 23847 |
15.73 |
| 2026-07-30 12:00 |
05:06:50.72 |
+16:04:26.0 |
HIP 23847 |
12.72 |
| 2026-07-31 00:00 |
05:07:04.42 |
+16:04:17.1 |
HIP 23847 |
9.91 |
| 2026-07-31 12:00 |
05:07:18.05 |
+16:04:07.8 |
HIP 23847 |
7.51 |
| 2026-08-01 00:00 |
05:07:31.61 |
+16:03:58.2 |
HIP 23847 |
6.00 |
| 2026-08-01 12:00 |
05:07:45.08 |
+16:03:48.3 |
HIP 23847 |
6.07 |
| 2026-08-02 00:00 |
05:07:58.48 |
+16:03:38.1 |
HIP 23847 |
7.64 |
| 2026-08-02 12:00 |
05:08:11.80 |
+16:03:27.6 |
HIP 23847 |
10.02 |
| 2026-08-03 00:00 |
05:08:25.05 |
+16:03:16.8 |
HIP 23847 |
12.75 |
| 2026-08-03 12:00 |
05:08:38.22 |
+16:03:05.7 |
HIP 23897 |
14.13 |
| 2026-08-04 00:00 |
05:08:51.30 |
+16:02:54.2 |
HIP 23897 |
15.94 |
| 2026-08-04 12:00 |
05:09:04.31 |
+16:02:42.5 |
HIP 23897 |
18.11 |
| 2026-08-05 00:00 |
05:09:17.24 |
+16:02:30.4 |
HIP 23897 |
20.50 |
| 2026-08-05 12:00 |
05:09:30.08 |
+16:02:18.1 |
HIP 23897 |
23.05 |
| 2026-08-06 00:00 |
05:09:42.85 |
+16:02:05.4 |
HIP 23897 |
25.70 |
| 2026-08-06 12:00 |
05:09:55.53 |
+16:01:52.4 |
HIP 24197 |
25.49 |
| 2026-08-07 00:00 |
05:10:08.13 |
+16:01:39.2 |
HIP 24197 |
22.48 |
| 2026-08-07 12:00 |
05:10:20.65 |
+16:01:25.6 |
HIP 24197 |
19.49 |
| 2026-08-08 00:00 |
05:10:33.08 |
+16:01:11.7 |
HIP 24197 |
16.53 |
| 2026-08-08 12:00 |
05:10:45.43 |
+16:00:57.5 |
HIP 24197 |
13.61 |
| 2026-08-09 00:00 |
05:10:57.69 |
+16:00:43.0 |
HIP 24197 |
10.73 |
| 2026-08-09 12:00 |
05:11:09.86 |
+16:00:28.3 |
HIP 24197 |
7.95 |
| 2026-08-10 00:00 |
05:11:21.95 |
+16:00:13.2 |
HIP 24197 |
5.34 |
| 2026-08-10 12:00 |
05:11:33.95 |
+15:59:57.8 |
HIP 24197 |
3.32 |
| 2026-08-11 00:00 |
05:11:45.86 |
+15:59:42.1 |
HIP 24197 |
3.21 |
| 2026-08-11 12:00 |
05:11:57.69 |
+15:59:26.2 |
HIP 24197 |
5.09 |
| 2026-08-12 00:00 |
05:12:09.42 |
+15:59:09.9 |
HIP 24197 |
7.59 |
| 2026-08-12 12:00 |
05:12:21.07 |
+15:58:53.3 |
HIP 24197 |
10.24 |
| 2026-08-13 00:00 |
05:12:32.62 |
+15:58:36.5 |
HIP 24197 |
12.95 |
| 2026-08-13 12:00 |
05:12:44.08 |
+15:58:19.3 |
HIP 24197 |
15.66 |
| 2026-08-14 00:00 |
05:12:55.45 |
+15:58:01.9 |
HIP 24197 |
18.37 |
| 2026-08-14 12:00 |
05:13:06.73 |
+15:57:44.2 |
HIP 24197 |
21.07 |
| 2026-08-15 00:00 |
05:13:17.91 |
+15:57:26.2 |
HIP 24292 |
22.22 |
| 2026-08-15 12:00 |
05:13:29.00 |
+15:57:07.9 |
HIP 24292 |
23.50 |
| 2026-08-16 00:00 |
05:13:40.00 |
+15:56:49.4 |
HIP 24292 |
24.99 |
| 2026-08-16 12:00 |
05:13:50.90 |
+15:56:30.5 |
HIP 24292 |
26.66 |
| 2026-08-17 00:00 |
05:14:01.70 |
+15:56:11.4 |
HIP 24524 |
25.47 |
| 2026-08-17 12:00 |
05:14:12.41 |
+15:55:52.0 |
HIP 24524 |
23.14 |
| 2026-08-18 00:00 |
05:14:23.03 |
+15:55:32.3 |
HIP 24524 |
20.90 |
| 2026-08-18 12:00 |
05:14:33.54 |
+15:55:12.4 |
HIP 24524 |
18.77 |
| 2026-08-19 00:00 |
05:14:43.96 |
+15:54:52.1 |
HIP 24524 |
16.78 |