메타데이터
| 항목 |
값 |
| Designation |
42P/Neujmin 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2004-07-16T05:22:50.543040Z |
| Orbit solution date (soln_date, UTC) |
2025-05-16T08:56:55Z |
| Obs used |
262 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-01-20.0000000 |
| e |
0.58562308 |
| q (au) |
2.013138 |
| a (au) |
4.858229 |
| i (deg) |
3.985667 |
| Ω (om, deg) |
150.351892 |
| ω (w, deg) |
147.175572 |
| M (ma, deg) |
84.474127 |
밝기
산란 + 전체 선형
$$
M_a = (17.697 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.697 |
| n |
6.000 |
| gf |
0.806 |
| gb |
-0.848 |
| k |
0.840 |
| δ90 |
5.639 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:43:41.99 |
+03:25:11.4 |
HIP 3518 |
22.51 |
| 2026-06-01 12:00 |
00:44:27.83 |
+03:29:18.8 |
HIP 3518 |
18.56 |
| 2026-06-02 00:00 |
00:45:13.50 |
+03:33:24.8 |
HIP 3518 |
21.83 |
| 2026-06-02 12:00 |
00:45:59.02 |
+03:37:29.4 |
HIP 3618 |
11.67 |
| 2026-06-03 00:00 |
00:46:44.37 |
+03:41:32.6 |
HIP 3618 |
7.62 |
| 2026-06-03 12:00 |
00:47:29.56 |
+03:45:34.5 |
HIP 3618 |
16.36 |
| 2026-06-04 00:00 |
00:48:14.58 |
+03:49:35.0 |
HIP 3764 |
19.09 |
| 2026-06-04 12:00 |
00:48:59.44 |
+03:53:34.2 |
HIP 3764 |
17.79 |
| 2026-06-05 00:00 |
00:49:44.13 |
+03:57:31.9 |
HIP 3764 |
23.43 |
| 2026-06-05 12:00 |
00:50:28.65 |
+04:01:28.2 |
HIP 4056 |
21.94 |
| 2026-06-06 00:00 |
00:51:13.01 |
+04:05:23.2 |
HIP 4056 |
10.92 |
| 2026-06-06 12:00 |
00:51:57.20 |
+04:09:16.7 |
HIP 4056 |
5.66 |
| 2026-06-07 00:00 |
00:52:41.22 |
+04:13:08.8 |
HIP 4176 |
12.44 |
| 2026-06-07 12:00 |
00:53:25.07 |
+04:16:59.5 |
HIP 4176 |
11.89 |
| 2026-06-08 00:00 |
00:54:08.75 |
+04:20:48.7 |
HIP 4176 |
19.88 |
| 2026-06-08 12:00 |
00:54:52.25 |
+04:24:36.5 |
HIP 4352 |
15.23 |
| 2026-06-09 00:00 |
00:55:35.58 |
+04:28:22.8 |
HIP 4352 |
3.91 |
| 2026-06-09 12:00 |
00:56:18.74 |
+04:32:07.7 |
HIP 4352 |
7.73 |
| 2026-06-10 00:00 |
00:57:01.72 |
+04:35:51.1 |
HIP 4352 |
19.02 |
| 2026-06-10 12:00 |
00:57:44.52 |
+04:39:33.0 |
HIP 4557 |
23.37 |
| 2026-06-11 00:00 |
00:58:27.15 |
+04:43:13.5 |
HIP 4557 |
25.51 |
| 2026-06-11 12:00 |
00:59:09.60 |
+04:46:52.4 |
HIP 4737 |
25.38 |
| 2026-06-12 00:00 |
00:59:51.86 |
+04:50:29.9 |
HIP 4737 |
14.66 |
| 2026-06-12 12:00 |
01:00:33.95 |
+04:54:05.9 |
HIP 4737 |
5.82 |
| 2026-06-13 00:00 |
01:01:15.85 |
+04:57:40.3 |
HIP 4737 |
9.88 |
| 2026-06-13 12:00 |
01:01:57.57 |
+05:01:13.2 |
HIP 4849 |
7.10 |
| 2026-06-14 00:00 |
01:02:39.10 |
+05:04:44.6 |
HIP 4849 |
3.83 |
| 2026-06-14 12:00 |
01:03:20.45 |
+05:08:14.4 |
HIP 4968 |
7.75 |
| 2026-06-15 00:00 |
01:04:01.61 |
+05:11:42.7 |
HIP 4968 |
5.74 |
| 2026-06-15 12:00 |
01:04:42.58 |
+05:15:09.5 |
HIP 4968 |
15.44 |
| 2026-06-16 00:00 |
01:05:23.36 |
+05:18:34.7 |
HIP 5074 |
22.16 |
| 2026-06-16 12:00 |
01:06:03.95 |
+05:21:58.3 |
HIP 5074 |
24.86 |
| 2026-06-17 00:00 |
01:06:44.35 |
+05:25:20.3 |
HIP 5263 |
26.07 |
| 2026-06-17 12:00 |
01:07:24.55 |
+05:28:40.8 |
HIP 5346 |
17.71 |
| 2026-06-18 00:00 |
01:08:04.56 |
+05:31:59.7 |
HIP 5346 |
8.30 |
| 2026-06-18 12:00 |
01:08:44.38 |
+05:35:17.0 |
HIP 5346 |
6.63 |
| 2026-06-19 00:00 |
01:09:23.99 |
+05:38:32.7 |
HIP 5432 |
11.92 |
| 2026-06-19 12:00 |
01:10:03.41 |
+05:41:46.8 |
HIP 5432 |
17.60 |
| 2026-06-20 00:00 |
01:10:42.64 |
+05:44:59.4 |
HIP 5432 |
26.23 |
| 2026-06-20 12:00 |
01:11:21.66 |
+05:48:10.3 |
HIP 5432 |
35.68 |
| 2026-06-21 00:00 |
01:12:00.48 |
+05:51:19.6 |
HIP 5655 |
45.31 |
| 2026-06-21 12:00 |
01:12:39.10 |
+05:54:27.3 |
HIP 5655 |
41.16 |
| 2026-06-22 00:00 |
01:13:17.52 |
+05:57:33.4 |
HIP 5655 |
39.24 |