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
$$
M_a = (11.415 + 5.655\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.415 |
| n |
5.655 |
| gf |
0.936 |
| 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) |
| 2026-03-26 00:00 |
13:04:29.48 |
-12:13:48.4 |
HIP 63897 |
19.75 |
| 2026-03-26 12:00 |
13:04:14.56 |
-12:12:14.2 |
HIP 63897 |
23.71 |
| 2026-03-27 00:00 |
13:03:59.59 |
-12:10:39.4 |
HIP 63610 |
26.40 |
| 2026-03-27 12:00 |
13:03:44.59 |
-12:09:04.0 |
HIP 63610 |
22.55 |
| 2026-03-28 00:00 |
13:03:29.54 |
-12:07:27.9 |
HIP 63610 |
18.76 |
| 2026-03-28 12:00 |
13:03:14.46 |
-12:05:51.3 |
HIP 63610 |
15.06 |
| 2026-03-29 00:00 |
13:02:59.34 |
-12:04:14.2 |
HIP 63610 |
11.58 |
| 2026-03-29 12:00 |
13:02:44.19 |
-12:02:36.4 |
HIP 63610 |
8.60 |
| 2026-03-30 00:00 |
13:02:29.02 |
-12:00:58.2 |
HIP 63610 |
6.82 |
| 2026-03-30 12:00 |
13:02:13.81 |
-11:59:19.3 |
HIP 63610 |
7.22 |
| 2026-03-31 00:00 |
13:01:58.58 |
-11:57:40.0 |
HIP 63610 |
9.54 |
| 2026-03-31 12:00 |
13:01:43.33 |
-11:56:00.2 |
HIP 63610 |
12.78 |
| 2026-04-01 00:00 |
13:01:28.06 |
-11:54:19.9 |
HIP 63610 |
16.41 |
| 2026-04-01 12:00 |
13:01:12.77 |
-11:52:39.1 |
HIP 63610 |
20.23 |
| 2026-04-02 00:00 |
13:00:57.46 |
-11:50:57.9 |
HIP 63610 |
24.14 |
| 2026-04-02 12:00 |
13:00:42.14 |
-11:49:16.2 |
HIP 63400 |
23.92 |
| 2026-04-03 00:00 |
13:00:26.82 |
-11:47:34.0 |
HIP 63400 |
20.06 |
| 2026-04-03 12:00 |
13:00:11.48 |
-11:45:51.5 |
HIP 63400 |
16.32 |
| 2026-04-04 00:00 |
12:59:56.14 |
-11:44:08.6 |
HIP 63400 |
12.82 |
| 2026-04-04 12:00 |
12:59:40.79 |
-11:42:25.2 |
HIP 63400 |
9.80 |
| 2026-04-05 00:00 |
12:59:25.44 |
-11:40:41.5 |
HIP 63400 |
7.87 |
| 2026-04-05 12:00 |
12:59:10.10 |
-11:38:57.5 |
HIP 63400 |
7.88 |
| 2026-04-06 00:00 |
12:58:54.75 |
-11:37:13.1 |
HIP 63349 |
7.00 |
| 2026-04-06 12:00 |
12:58:39.42 |
-11:35:28.4 |
HIP 63349 |
5.92 |
| 2026-04-07 00:00 |
12:58:24.09 |
-11:33:43.3 |
HIP 63349 |
7.44 |
| 2026-04-07 12:00 |
12:58:08.77 |
-11:31:58.0 |
HIP 63349 |
10.48 |
| 2026-04-08 00:00 |
12:57:53.47 |
-11:30:12.4 |
HIP 63349 |
14.10 |
| 2026-04-08 12:00 |
12:57:38.18 |
-11:28:26.5 |
HIP 63349 |
17.94 |
| 2026-04-09 00:00 |
12:57:22.91 |
-11:26:40.4 |
HIP 63126 |
21.22 |
| 2026-04-09 12:00 |
12:57:07.66 |
-11:24:54.0 |
HIP 63126 |
17.09 |
| 2026-04-10 00:00 |
12:56:52.43 |
-11:23:07.4 |
HIP 63126 |
12.97 |
| 2026-04-10 12:00 |
12:56:37.23 |
-11:21:20.7 |
HIP 63126 |
8.86 |
| 2026-04-11 00:00 |
12:56:22.05 |
-11:19:33.7 |
HIP 63126 |
4.80 |
| 2026-04-11 12:00 |
12:56:06.91 |
-11:17:46.6 |
HIP 63126 |
1.27 |
| 2026-04-12 00:00 |
12:55:51.80 |
-11:15:59.3 |
HIP 63126 |
3.75 |
| 2026-04-12 12:00 |
12:55:36.72 |
-11:14:11.9 |
HIP 63126 |
7.77 |
| 2026-04-13 00:00 |
12:55:21.68 |
-11:12:24.3 |
HIP 63126 |
11.84 |
| 2026-04-13 12:00 |
12:55:06.68 |
-11:10:36.7 |
HIP 63126 |
15.92 |
| 2026-04-14 00:00 |
12:54:51.72 |
-11:08:49.0 |
HIP 63126 |
19.99 |
| 2026-04-14 12:00 |
12:54:36.80 |
-11:07:01.2 |
HIP 62889 |
22.31 |
| 2026-04-15 00:00 |
12:54:21.94 |
-11:05:13.3 |
HIP 62889 |
18.26 |
| 2026-04-15 12:00 |
12:54:07.12 |
-11:03:25.4 |
HIP 62889 |
14.24 |
| 2026-04-16 00:00 |
12:53:52.35 |
-11:01:37.5 |
HIP 62889 |
10.26 |