메타데이터
| 항목 |
값 |
| Designation |
291P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-12-15T08:00:33.684480Z |
| Orbit solution date (soln_date, UTC) |
2024-05-30T01:12:35Z |
| Obs used |
950 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
19.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-10-22.0000000 |
| e |
0.43049276 |
| q (au) |
2.591490 |
| a (au) |
4.550407 |
| i (deg) |
5.956694 |
| Ω (om, deg) |
241.044470 |
| ω (w, deg) |
176.028242 |
| M (ma, deg) |
317.421677 |
밝기
산란 + 전체 선형
$$
M_a = (11.419 + 5.655\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.419 |
| n |
5.655 |
| gf |
0.807 |
| gb |
-0.768 |
| k |
0.973 |
| δ90 |
1.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
12:38:49.91 |
-08:46:53.5 |
HIP 61797 |
20.39 |
| 2026-06-01 12:00 |
12:38:46.72 |
-08:46:01.4 |
HIP 61797 |
20.54 |
| 2026-06-02 00:00 |
12:38:43.69 |
-08:45:10.3 |
HIP 61797 |
20.72 |
| 2026-06-02 12:00 |
12:38:40.82 |
-08:44:20.1 |
HIP 61797 |
20.94 |
| 2026-06-03 00:00 |
12:38:38.11 |
-08:43:30.9 |
HIP 61797 |
21.18 |
| 2026-06-03 12:00 |
12:38:35.55 |
-08:42:42.7 |
HIP 61797 |
21.44 |
| 2026-06-04 00:00 |
12:38:33.16 |
-08:41:55.5 |
HIP 61797 |
21.72 |
| 2026-06-04 12:00 |
12:38:30.92 |
-08:41:09.3 |
HIP 61797 |
22.00 |
| 2026-06-05 00:00 |
12:38:28.85 |
-08:40:24.1 |
HIP 61797 |
22.29 |
| 2026-06-05 12:00 |
12:38:26.93 |
-08:39:39.9 |
HIP 61797 |
22.57 |
| 2026-06-06 00:00 |
12:38:25.17 |
-08:38:56.7 |
HIP 61797 |
22.85 |
| 2026-06-06 12:00 |
12:38:23.57 |
-08:38:14.5 |
HIP 61797 |
23.12 |
| 2026-06-07 00:00 |
12:38:22.13 |
-08:37:33.2 |
HIP 61797 |
23.38 |
| 2026-06-07 12:00 |
12:38:20.85 |
-08:36:53.0 |
HIP 61797 |
23.62 |
| 2026-06-08 00:00 |
12:38:19.72 |
-08:36:13.8 |
HIP 61599 |
23.25 |
| 2026-06-08 12:00 |
12:38:18.76 |
-08:35:35.6 |
HIP 61599 |
22.61 |
| 2026-06-09 00:00 |
12:38:17.95 |
-08:34:58.5 |
HIP 61599 |
22.00 |
| 2026-06-09 12:00 |
12:38:17.30 |
-08:34:22.3 |
HIP 61599 |
21.44 |
| 2026-06-10 00:00 |
12:38:16.81 |
-08:33:47.1 |
HIP 61599 |
20.91 |
| 2026-06-10 12:00 |
12:38:16.47 |
-08:33:13.0 |
HIP 61599 |
20.43 |
| 2026-06-11 00:00 |
12:38:16.30 |
-08:32:39.9 |
HIP 61599 |
19.99 |
| 2026-06-11 12:00 |
12:38:16.28 |
-08:32:07.8 |
HIP 61599 |
19.60 |
| 2026-06-12 00:00 |
12:38:16.42 |
-08:31:36.7 |
HIP 61599 |
19.26 |
| 2026-06-12 12:00 |
12:38:16.72 |
-08:31:06.6 |
HIP 61599 |
18.96 |
| 2026-06-13 00:00 |
12:38:17.17 |
-08:30:37.6 |
HIP 61599 |
18.71 |
| 2026-06-13 12:00 |
12:38:17.78 |
-08:30:09.6 |
HIP 61599 |
18.52 |
| 2026-06-14 00:00 |
12:38:18.55 |
-08:29:42.6 |
HIP 61599 |
18.37 |
| 2026-06-14 12:00 |
12:38:19.48 |
-08:29:16.6 |
HIP 61599 |
18.28 |
| 2026-06-15 00:00 |
12:38:20.56 |
-08:28:51.7 |
HIP 61599 |
18.24 |
| 2026-06-15 12:00 |
12:38:21.80 |
-08:28:27.7 |
HIP 61599 |
18.26 |
| 2026-06-16 00:00 |
12:38:23.19 |
-08:28:04.9 |
HIP 61599 |
18.33 |
| 2026-06-16 12:00 |
12:38:24.74 |
-08:27:43.0 |
HIP 61599 |
18.45 |
| 2026-06-17 00:00 |
12:38:26.45 |
-08:27:22.1 |
HIP 61599 |
18.64 |
| 2026-06-17 12:00 |
12:38:28.30 |
-08:27:02.3 |
HIP 61599 |
18.88 |
| 2026-06-18 00:00 |
12:38:30.32 |
-08:26:43.5 |
HIP 61599 |
19.17 |
| 2026-06-18 12:00 |
12:38:32.48 |
-08:26:25.7 |
HIP 61599 |
19.52 |
| 2026-06-19 00:00 |
12:38:34.81 |
-08:26:09.0 |
HIP 61599 |
19.92 |
| 2026-06-19 12:00 |
12:38:37.28 |
-08:25:53.2 |
HIP 61599 |
20.38 |
| 2026-06-20 00:00 |
12:38:39.90 |
-08:25:38.5 |
HIP 61797 |
20.87 |
| 2026-06-20 12:00 |
12:38:42.68 |
-08:25:24.8 |
HIP 61797 |
20.36 |
| 2026-06-21 00:00 |
12:38:45.61 |
-08:25:12.1 |
HIP 61797 |
19.82 |
| 2026-06-21 12:00 |
12:38:48.69 |
-08:25:00.4 |
HIP 61797 |
19.25 |
| 2026-06-22 00:00 |
12:38:51.92 |
-08:24:49.7 |
HIP 61797 |
18.66 |