메타데이터
| 항목 |
값 |
| Designation |
180P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-12-12T15:22:26.811840Z |
| Orbit solution date (soln_date, UTC) |
2024-03-20T08:31:27Z |
| Obs used |
1053 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-04-24.0000000 |
| e |
0.35485436 |
| q (au) |
2.489292 |
| a (au) |
3.858497 |
| i (deg) |
16.870826 |
| Ω (om, deg) |
84.571386 |
| ω (w, deg) |
94.861225 |
| M (ma, deg) |
17.342053 |
밝기
산란 + 전체 선형
$$
M_a = (9.358 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.358 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2022-09-29 |
2023-06-28 |
+16.2858 |
-6.848 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
23:21:44.11 |
-26:20:00.0 |
HIP 115465 |
22.50 |
| 2026-09-20 12:00 |
23:21:26.27 |
-26:21:13.2 |
HIP 115465 |
26.32 |
| 2026-09-21 00:00 |
23:21:08.48 |
-26:22:24.7 |
HIP 115154 |
22.33 |
| 2026-09-21 12:00 |
23:20:50.74 |
-26:23:34.4 |
HIP 115154 |
18.20 |
| 2026-09-22 00:00 |
23:20:33.06 |
-26:24:42.4 |
HIP 115154 |
14.10 |
| 2026-09-22 12:00 |
23:20:15.44 |
-26:25:48.6 |
HIP 115154 |
10.03 |
| 2026-09-23 00:00 |
23:19:57.88 |
-26:26:53.0 |
HIP 115154 |
6.01 |
| 2026-09-23 12:00 |
23:19:40.39 |
-26:27:55.7 |
HIP 115154 |
2.23 |
| 2026-09-24 00:00 |
23:19:22.97 |
-26:28:56.5 |
HIP 115154 |
2.54 |
| 2026-09-24 12:00 |
23:19:05.61 |
-26:29:55.6 |
HIP 115154 |
6.33 |
| 2026-09-25 00:00 |
23:18:48.33 |
-26:30:52.9 |
HIP 115154 |
10.26 |
| 2026-09-25 12:00 |
23:18:31.12 |
-26:31:48.4 |
HIP 115154 |
14.19 |
| 2026-09-26 00:00 |
23:18:14.00 |
-26:32:42.1 |
HIP 115154 |
18.11 |
| 2026-09-26 12:00 |
23:17:56.95 |
-26:33:34.1 |
HIP 115154 |
22.00 |
| 2026-09-27 00:00 |
23:17:39.99 |
-26:34:24.2 |
HIP 115154 |
25.88 |
| 2026-09-27 12:00 |
23:17:23.12 |
-26:35:12.4 |
HIP 115154 |
29.73 |
| 2026-09-28 00:00 |
23:17:06.34 |
-26:35:58.9 |
HIP 114908 |
29.95 |
| 2026-09-28 12:00 |
23:16:49.64 |
-26:36:43.6 |
HIP 114908 |
28.44 |
| 2026-09-29 00:00 |
23:16:33.05 |
-26:37:26.4 |
HIP 114908 |
27.41 |
| 2026-09-29 12:00 |
23:16:16.55 |
-26:38:07.4 |
HIP 114908 |
26.89 |
| 2026-09-30 00:00 |
23:16:00.15 |
-26:38:46.6 |
HIP 114908 |
26.92 |
| 2026-09-30 12:00 |
23:15:43.85 |
-26:39:24.0 |
HIP 114908 |
27.48 |
| 2026-10-01 00:00 |
23:15:27.66 |
-26:39:59.5 |
HIP 114651 |
27.08 |
| 2026-10-01 12:00 |
23:15:11.58 |
-26:40:33.2 |
HIP 114651 |
23.83 |
| 2026-10-02 00:00 |
23:14:55.61 |
-26:41:05.1 |
HIP 114651 |
20.72 |
| 2026-10-02 12:00 |
23:14:39.74 |
-26:41:35.1 |
HIP 114651 |
17.82 |
| 2026-10-03 00:00 |
23:14:24.00 |
-26:42:03.3 |
HIP 114651 |
15.20 |
| 2026-10-03 12:00 |
23:14:08.37 |
-26:42:29.7 |
HIP 114651 |
13.03 |
| 2026-10-04 00:00 |
23:13:52.86 |
-26:42:54.2 |
HIP 114651 |
11.52 |
| 2026-10-04 12:00 |
23:13:37.48 |
-26:43:16.9 |
HIP 114599 |
9.28 |
| 2026-10-05 00:00 |
23:13:22.22 |
-26:43:37.7 |
HIP 114599 |
5.88 |
| 2026-10-05 12:00 |
23:13:07.09 |
-26:43:56.7 |
HIP 114599 |
2.56 |
| 2026-10-06 00:00 |
23:12:52.09 |
-26:44:13.9 |
HIP 114599 |
1.27 |
| 2026-10-06 12:00 |
23:12:37.22 |
-26:44:29.2 |
HIP 114599 |
4.36 |
| 2026-10-07 00:00 |
23:12:22.49 |
-26:44:42.7 |
HIP 114599 |
7.63 |
| 2026-10-07 12:00 |
23:12:07.89 |
-26:44:54.3 |
HIP 114599 |
10.88 |
| 2026-10-08 00:00 |
23:11:53.44 |
-26:45:04.1 |
HIP 114599 |
14.11 |
| 2026-10-08 12:00 |
23:11:39.12 |
-26:45:12.1 |
HIP 114599 |
17.30 |
| 2026-10-09 00:00 |
23:11:24.96 |
-26:45:18.2 |
HIP 114599 |
20.47 |
| 2026-10-09 12:00 |
23:11:10.93 |
-26:45:22.5 |
HIP 114599 |
23.60 |
| 2026-10-10 00:00 |
23:10:57.06 |
-26:45:25.0 |
HIP 114436 |
24.21 |
| 2026-10-10 12:00 |
23:10:43.34 |
-26:45:25.6 |
HIP 114436 |
23.75 |
| 2026-10-11 00:00 |
23:10:29.77 |
-26:45:24.5 |
HIP 114436 |
23.66 |