메타데이터
| 항목 |
값 |
| Designation |
408P/Novichonok-Gerke |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-09-28T03:15:49.726080Z |
| Orbit solution date (soln_date, UTC) |
2025-08-07T09:12:25Z |
| Obs used |
1766 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-10.0000000 |
| e |
0.27128556 |
| q (au) |
3.485699 |
| a (au) |
4.783355 |
| i (deg) |
19.235651 |
| Ω (om, deg) |
189.795782 |
| ω (w, deg) |
224.806417 |
| M (ma, deg) |
275.102372 |
밝기
산란 + 전체 선형
$$
M_a = (6.485 + 5.520\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.485 |
| n |
5.520 |
| gf |
0.931 |
| gb |
-0.752 |
| k |
1.000 |
| δ90 |
8.473 |
| 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 |
| 2020-06-20 |
2021-08-29 |
+11.0173 |
-5.838 |
| 2021-08-29 |
2022-09-27 |
+2.6747 |
-1.359 |
| 2022-09-28 |
2025-07-23 |
-1.7437 |
+0.790 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
13:24:16.24 |
-04:47:31.9 |
HIP 65392 |
15.50 |
| 2026-03-26 12:00 |
13:24:03.11 |
-04:45:15.6 |
HIP 65392 |
13.12 |
| 2026-03-27 00:00 |
13:23:49.91 |
-04:42:59.1 |
HIP 65392 |
11.65 |
| 2026-03-27 12:00 |
13:23:36.65 |
-04:40:42.4 |
HIP 65392 |
11.46 |
| 2026-03-28 00:00 |
13:23:23.32 |
-04:38:25.4 |
HIP 65392 |
12.64 |
| 2026-03-28 12:00 |
13:23:09.93 |
-04:36:08.2 |
HIP 65392 |
14.87 |
| 2026-03-29 00:00 |
13:22:56.49 |
-04:33:50.9 |
HIP 65243 |
12.69 |
| 2026-03-29 12:00 |
13:22:42.99 |
-04:31:33.4 |
HIP 65243 |
11.36 |
| 2026-03-30 00:00 |
13:22:29.43 |
-04:29:15.8 |
HIP 65243 |
11.42 |
| 2026-03-30 12:00 |
13:22:15.83 |
-04:26:58.0 |
HIP 65243 |
12.84 |
| 2026-03-31 00:00 |
13:22:02.17 |
-04:24:40.2 |
HIP 65243 |
15.27 |
| 2026-03-31 12:00 |
13:21:48.47 |
-04:22:22.2 |
HIP 65243 |
18.31 |
| 2026-04-01 00:00 |
13:21:34.72 |
-04:20:04.2 |
HIP 65243 |
21.72 |
| 2026-04-01 12:00 |
13:21:20.93 |
-04:17:46.1 |
HIP 65243 |
25.34 |
| 2026-04-02 00:00 |
13:21:07.10 |
-04:15:28.0 |
HIP 65243 |
29.11 |
| 2026-04-02 12:00 |
13:20:53.24 |
-04:13:09.8 |
HIP 65243 |
32.98 |
| 2026-04-03 00:00 |
13:20:39.33 |
-04:10:51.6 |
HIP 65243 |
36.91 |
| 2026-04-03 12:00 |
13:20:25.40 |
-04:08:33.5 |
HIP 65243 |
40.90 |
| 2026-04-04 00:00 |
13:20:11.43 |
-04:06:15.3 |
HIP 65243 |
44.92 |
| 2026-04-04 12:00 |
13:19:57.44 |
-04:03:57.2 |
HIP 65243 |
48.97 |
| 2026-04-05 00:00 |
13:19:43.42 |
-04:01:39.2 |
HIP 65243 |
53.05 |
| 2026-04-05 12:00 |
13:19:29.37 |
-03:59:21.2 |
HIP 64731 |
51.71 |
| 2026-04-06 00:00 |
13:19:15.30 |
-03:57:03.4 |
HIP 64731 |
48.04 |
| 2026-04-06 12:00 |
13:19:01.22 |
-03:54:45.6 |
HIP 64731 |
44.45 |
| 2026-04-07 00:00 |
13:18:47.11 |
-03:52:28.0 |
HIP 64731 |
40.98 |
| 2026-04-07 12:00 |
13:18:32.99 |
-03:50:10.5 |
HIP 64731 |
37.65 |
| 2026-04-08 00:00 |
13:18:18.86 |
-03:47:53.1 |
HIP 64731 |
34.51 |
| 2026-04-08 12:00 |
13:18:04.72 |
-03:45:36.0 |
HIP 64731 |
31.61 |
| 2026-04-09 00:00 |
13:17:50.57 |
-03:43:19.0 |
HIP 64731 |
29.02 |
| 2026-04-09 12:00 |
13:17:36.42 |
-03:41:02.3 |
HIP 64731 |
26.85 |
| 2026-04-10 00:00 |
13:17:22.27 |
-03:38:45.7 |
HIP 64731 |
25.19 |
| 2026-04-10 12:00 |
13:17:08.11 |
-03:36:29.5 |
HIP 64731 |
24.15 |
| 2026-04-11 00:00 |
13:16:53.96 |
-03:34:13.5 |
HIP 64731 |
23.82 |
| 2026-04-11 12:00 |
13:16:39.81 |
-03:31:57.7 |
HIP 64731 |
24.21 |
| 2026-04-12 00:00 |
13:16:25.66 |
-03:29:42.3 |
HIP 64721 |
23.99 |
| 2026-04-12 12:00 |
13:16:11.53 |
-03:27:27.2 |
HIP 64721 |
20.99 |
| 2026-04-13 00:00 |
13:15:57.41 |
-03:25:12.4 |
HIP 64721 |
18.45 |
| 2026-04-13 12:00 |
13:15:43.30 |
-03:22:58.0 |
HIP 64721 |
16.59 |
| 2026-04-14 00:00 |
13:15:29.21 |
-03:20:43.9 |
HIP 64721 |
15.66 |
| 2026-04-14 12:00 |
13:15:15.14 |
-03:18:30.2 |
HIP 64721 |
15.81 |
| 2026-04-15 00:00 |
13:15:01.09 |
-03:16:17.0 |
HIP 64721 |
17.01 |
| 2026-04-15 12:00 |
13:14:47.07 |
-03:14:04.1 |
HIP 64721 |
19.05 |
| 2026-04-16 00:00 |
13:14:33.07 |
-03:11:51.7 |
HIP 64721 |
21.70 |