메타데이터
| 항목 |
값 |
| Designation |
212P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-12-03T05:58:31.068480Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:03Z |
| Obs used |
154 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
8.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-01-04.0000000 |
| e |
0.57896629 |
| q (au) |
1.652279 |
| a (au) |
3.924338 |
| i (deg) |
22.407036 |
| Ω (om, deg) |
98.910032 |
| ω (w, deg) |
14.977137 |
| M (ma, deg) |
96.575628 |
밝기
산란 + 전체 선형
$$
M_a = (15.367 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.367 |
| n |
6.000 |
| gf |
0.807 |
| gb |
-1.000 |
| k |
0.982 |
| δ90 |
1.401 |
| 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) |
| 2026-05-12 00:00 |
17:58:16.47 |
-16:04:36.1 |
HIP 88145 |
27.96 |
| 2026-05-12 12:00 |
17:58:02.14 |
-16:04:52.0 |
HIP 87813 |
29.57 |
| 2026-05-13 00:00 |
17:57:47.63 |
-16:05:08.3 |
HIP 87813 |
26.88 |
| 2026-05-13 12:00 |
17:57:32.96 |
-16:05:24.8 |
HIP 87813 |
24.36 |
| 2026-05-14 00:00 |
17:57:18.12 |
-16:05:41.6 |
HIP 87813 |
22.11 |
| 2026-05-14 12:00 |
17:57:03.11 |
-16:05:58.7 |
HIP 87813 |
20.23 |
| 2026-05-15 00:00 |
17:56:47.94 |
-16:06:16.1 |
HIP 87813 |
18.85 |
| 2026-05-15 12:00 |
17:56:32.60 |
-16:06:33.9 |
HIP 87813 |
18.12 |
| 2026-05-16 00:00 |
17:56:17.11 |
-16:06:51.9 |
HIP 87813 |
18.13 |
| 2026-05-16 12:00 |
17:56:01.46 |
-16:07:10.3 |
HIP 87788 |
17.30 |
| 2026-05-17 00:00 |
17:55:45.65 |
-16:07:28.9 |
HIP 87788 |
17.25 |
| 2026-05-17 12:00 |
17:55:29.69 |
-16:07:47.9 |
HIP 87788 |
18.03 |
| 2026-05-18 00:00 |
17:55:13.58 |
-16:08:07.1 |
HIP 87788 |
19.57 |
| 2026-05-18 12:00 |
17:54:57.32 |
-16:08:26.7 |
HIP 87788 |
21.72 |
| 2026-05-19 00:00 |
17:54:40.91 |
-16:08:46.6 |
HIP 87788 |
24.33 |
| 2026-05-19 12:00 |
17:54:24.36 |
-16:09:06.8 |
HIP 87788 |
27.30 |
| 2026-05-20 00:00 |
17:54:07.66 |
-16:09:27.3 |
HIP 87788 |
30.53 |
| 2026-05-20 12:00 |
17:53:50.83 |
-16:09:48.1 |
HIP 87413 |
29.92 |
| 2026-05-21 00:00 |
17:53:33.86 |
-16:10:09.2 |
HIP 87413 |
25.91 |
| 2026-05-21 12:00 |
17:53:16.75 |
-16:10:30.6 |
HIP 87413 |
21.90 |
| 2026-05-22 00:00 |
17:52:59.51 |
-16:10:52.3 |
HIP 87413 |
17.90 |
| 2026-05-22 12:00 |
17:52:42.14 |
-16:11:14.4 |
HIP 87413 |
13.97 |
| 2026-05-23 00:00 |
17:52:24.65 |
-16:11:36.7 |
HIP 87413 |
10.21 |
| 2026-05-23 12:00 |
17:52:07.03 |
-16:11:59.3 |
HIP 87413 |
6.97 |
| 2026-05-24 00:00 |
17:51:49.29 |
-16:12:22.2 |
HIP 87413 |
5.39 |
| 2026-05-24 12:00 |
17:51:31.43 |
-16:12:45.5 |
HIP 87413 |
6.80 |
| 2026-05-25 00:00 |
17:51:13.45 |
-16:13:09.0 |
HIP 87333 |
8.40 |
| 2026-05-25 12:00 |
17:50:55.35 |
-16:13:32.8 |
HIP 87333 |
5.29 |
| 2026-05-26 00:00 |
17:50:37.15 |
-16:13:56.9 |
HIP 87333 |
4.86 |
| 2026-05-26 12:00 |
17:50:18.83 |
-16:14:21.3 |
HIP 87333 |
7.62 |
| 2026-05-27 00:00 |
17:50:00.41 |
-16:14:46.1 |
HIP 87333 |
11.49 |
| 2026-05-27 12:00 |
17:49:41.88 |
-16:15:11.1 |
HIP 87207 |
9.79 |
| 2026-05-28 00:00 |
17:49:23.25 |
-16:15:36.3 |
HIP 87207 |
5.35 |
| 2026-05-28 12:00 |
17:49:04.52 |
-16:16:01.9 |
HIP 87207 |
1.32 |
| 2026-05-29 00:00 |
17:48:45.70 |
-16:16:27.8 |
HIP 87207 |
3.98 |
| 2026-05-29 12:00 |
17:48:26.78 |
-16:16:54.0 |
HIP 87207 |
8.46 |
| 2026-05-30 00:00 |
17:48:07.76 |
-16:17:20.4 |
HIP 87207 |
13.02 |
| 2026-05-30 12:00 |
17:47:48.66 |
-16:17:47.1 |
HIP 87207 |
17.61 |
| 2026-05-31 00:00 |
17:47:29.48 |
-16:18:14.2 |
HIP 87035 |
18.74 |
| 2026-05-31 12:00 |
17:47:10.21 |
-16:18:41.5 |
HIP 87035 |
16.99 |
| 2026-06-01 00:00 |
17:46:50.85 |
-16:19:09.0 |
HIP 87035 |
16.41 |
| 2026-06-01 12:00 |
17:46:31.42 |
-16:19:36.9 |
HIP 87035 |
17.13 |
| 2026-06-02 00:00 |
17:46:11.92 |
-16:20:05.1 |
HIP 87035 |
19.02 |