メタデータ
| 項目 |
値 |
| Designation |
479P/Elenin |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-05T07:27:38.416320Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:26Z |
| Obs used |
990 |
| NEO |
Yes |
| M1 |
16.200 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-18T13:30:33.264000Z |
| Discovery magnitude (MPC) |
21.79 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) |
2023-03-04.0000000 |
| e |
0.77856369 |
| q (au) |
1.244472 |
| a (au) |
5.619998 |
| i (deg) |
15.393352 |
| Ω (om, deg) |
295.845766 |
| ω (w, deg) |
263.493717 |
| M (ma, deg) |
328.314623 |
等級
散乱 + 全体線形
$$
M_a = (15.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.000 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.637 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-10-17 |
2024-05-04 |
+6.0878 |
-1.609 |
| 2024-05-05 |
2024-08-05 |
+11.6597 |
-2.541 |
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) |
| 2026-05-12 00:00 |
23:15:34.16 |
+07:03:38.5 |
HIP 114910 |
14.67 |
| 2026-05-12 12:00 |
23:15:44.46 |
+07:05:41.8 |
HIP 114910 |
13.02 |
| 2026-05-13 00:00 |
23:15:54.65 |
+07:07:44.7 |
HIP 114910 |
12.08 |
| 2026-05-13 12:00 |
23:16:04.74 |
+07:09:47.1 |
HIP 114910 |
11.98 |
| 2026-05-14 00:00 |
23:16:14.71 |
+07:11:49.2 |
HIP 114910 |
12.73 |
| 2026-05-14 12:00 |
23:16:24.58 |
+07:13:50.8 |
HIP 114910 |
14.18 |
| 2026-05-15 00:00 |
23:16:34.33 |
+07:15:52.1 |
HIP 114910 |
16.12 |
| 2026-05-15 12:00 |
23:16:43.97 |
+07:17:52.8 |
HIP 114913 |
17.12 |
| 2026-05-16 00:00 |
23:16:53.51 |
+07:19:53.2 |
HIP 114913 |
15.69 |
| 2026-05-16 12:00 |
23:17:02.93 |
+07:21:53.1 |
HIP 114913 |
14.78 |
| 2026-05-17 00:00 |
23:17:12.23 |
+07:23:52.5 |
HIP 114913 |
14.47 |
| 2026-05-17 12:00 |
23:17:21.43 |
+07:25:51.5 |
HIP 114913 |
14.77 |
| 2026-05-18 00:00 |
23:17:30.50 |
+07:27:50.0 |
HIP 114913 |
15.64 |
| 2026-05-18 12:00 |
23:17:39.47 |
+07:29:48.1 |
HIP 114913 |
16.97 |
| 2026-05-19 00:00 |
23:17:48.32 |
+07:31:45.6 |
HIP 114913 |
18.66 |
| 2026-05-19 12:00 |
23:17:57.05 |
+07:33:42.7 |
HIP 115059 |
17.22 |
| 2026-05-20 00:00 |
23:18:05.67 |
+07:35:39.3 |
HIP 115059 |
14.79 |
| 2026-05-20 12:00 |
23:18:14.17 |
+07:37:35.4 |
HIP 115059 |
12.56 |
| 2026-05-21 00:00 |
23:18:22.55 |
+07:39:31.0 |
HIP 115059 |
10.64 |
| 2026-05-21 12:00 |
23:18:30.82 |
+07:41:26.2 |
HIP 115059 |
9.20 |
| 2026-05-22 00:00 |
23:18:38.97 |
+07:43:20.8 |
HIP 115059 |
8.47 |
| 2026-05-22 12:00 |
23:18:46.99 |
+07:45:14.9 |
HIP 115059 |
8.59 |
| 2026-05-23 00:00 |
23:18:54.90 |
+07:47:08.4 |
HIP 115059 |
9.52 |
| 2026-05-23 12:00 |
23:19:02.69 |
+07:49:01.5 |
HIP 115059 |
11.03 |
| 2026-05-24 00:00 |
23:19:10.36 |
+07:50:54.0 |
HIP 115182 |
12.32 |
| 2026-05-24 12:00 |
23:19:17.91 |
+07:52:46.0 |
HIP 115182 |
9.68 |
| 2026-05-25 00:00 |
23:19:25.34 |
+07:54:37.5 |
HIP 115182 |
7.09 |
| 2026-05-25 12:00 |
23:19:32.65 |
+07:56:28.4 |
HIP 115182 |
4.54 |
| 2026-05-26 00:00 |
23:19:39.83 |
+07:58:18.8 |
HIP 115182 |
2.13 |
| 2026-05-26 12:00 |
23:19:46.90 |
+08:00:08.7 |
HIP 115182 |
1.25 |
| 2026-05-27 00:00 |
23:19:53.84 |
+08:01:57.9 |
HIP 115182 |
3.35 |
| 2026-05-27 12:00 |
23:20:00.66 |
+08:03:46.7 |
HIP 115182 |
5.76 |
| 2026-05-28 00:00 |
23:20:07.35 |
+08:05:34.8 |
HIP 115182 |
8.18 |
| 2026-05-28 12:00 |
23:20:13.92 |
+08:07:22.4 |
HIP 115182 |
10.59 |
| 2026-05-29 00:00 |
23:20:20.37 |
+08:09:09.4 |
HIP 115182 |
12.98 |
| 2026-05-29 12:00 |
23:20:26.69 |
+08:10:55.9 |
HIP 115182 |
15.34 |
| 2026-05-30 00:00 |
23:20:32.88 |
+08:12:41.8 |
HIP 115324 |
16.13 |
| 2026-05-30 12:00 |
23:20:38.95 |
+08:14:27.0 |
HIP 115324 |
14.02 |
| 2026-05-31 00:00 |
23:20:44.89 |
+08:16:11.7 |
HIP 115324 |
12.02 |
| 2026-05-31 12:00 |
23:20:50.71 |
+08:17:55.8 |
HIP 115324 |
10.17 |
| 2026-06-01 00:00 |
23:20:56.40 |
+08:19:39.3 |
HIP 115324 |
8.55 |
| 2026-06-01 12:00 |
23:21:01.96 |
+08:21:22.2 |
HIP 115324 |
7.29 |
| 2026-06-02 00:00 |
23:21:07.40 |
+08:23:04.4 |
HIP 115324 |
6.56 |