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) |
| 2026-05-12 00:00 |
13:03:56.21 |
-01:33:15.5 |
HIP 63670 |
15.03 |
| 2026-05-12 12:00 |
13:03:46.59 |
-01:31:45.9 |
HIP 63670 |
12.43 |
| 2026-05-13 00:00 |
13:03:37.10 |
-01:30:17.4 |
HIP 63670 |
9.99 |
| 2026-05-13 12:00 |
13:03:27.73 |
-01:28:50.0 |
HIP 63670 |
7.81 |
| 2026-05-14 00:00 |
13:03:18.50 |
-01:27:23.7 |
HIP 63670 |
6.14 |
| 2026-05-14 12:00 |
13:03:09.40 |
-01:25:58.6 |
HIP 63670 |
5.41 |
| 2026-05-15 00:00 |
13:03:00.43 |
-01:24:34.5 |
HIP 63670 |
5.92 |
| 2026-05-15 12:00 |
13:02:51.59 |
-01:23:11.5 |
HIP 63670 |
7.38 |
| 2026-05-16 00:00 |
13:02:42.89 |
-01:21:49.7 |
HIP 63670 |
9.32 |
| 2026-05-16 12:00 |
13:02:34.32 |
-01:20:29.0 |
HIP 63670 |
11.47 |
| 2026-05-17 00:00 |
13:02:25.89 |
-01:19:09.4 |
HIP 63670 |
13.72 |
| 2026-05-17 12:00 |
13:02:17.60 |
-01:17:51.0 |
HIP 63670 |
16.00 |
| 2026-05-18 00:00 |
13:02:09.45 |
-01:16:33.7 |
HIP 63670 |
18.29 |
| 2026-05-18 12:00 |
13:02:01.44 |
-01:15:17.6 |
HIP 63670 |
20.57 |
| 2026-05-19 00:00 |
13:01:53.57 |
-01:14:02.6 |
HIP 63670 |
22.83 |
| 2026-05-19 12:00 |
13:01:45.84 |
-01:12:48.8 |
HIP 63453 |
24.60 |
| 2026-05-20 00:00 |
13:01:38.26 |
-01:11:36.2 |
HIP 63453 |
22.65 |
| 2026-05-20 12:00 |
13:01:30.82 |
-01:10:24.7 |
HIP 63453 |
20.80 |
| 2026-05-21 00:00 |
13:01:23.53 |
-01:09:14.4 |
HIP 63453 |
19.06 |
| 2026-05-21 12:00 |
13:01:16.38 |
-01:08:05.3 |
HIP 63453 |
17.45 |
| 2026-05-22 00:00 |
13:01:09.38 |
-01:06:57.3 |
HIP 63453 |
15.99 |
| 2026-05-22 12:00 |
13:01:02.53 |
-01:05:50.5 |
HIP 63453 |
14.71 |
| 2026-05-23 00:00 |
13:00:55.82 |
-01:04:44.9 |
HIP 63453 |
13.64 |
| 2026-05-23 12:00 |
13:00:49.26 |
-01:03:40.5 |
HIP 63453 |
12.81 |
| 2026-05-24 00:00 |
13:00:42.85 |
-01:02:37.3 |
HIP 63453 |
12.26 |
| 2026-05-24 12:00 |
13:00:36.59 |
-01:01:35.2 |
HIP 63453 |
12.00 |
| 2026-05-25 00:00 |
13:00:30.49 |
-01:00:34.3 |
HIP 63453 |
12.03 |
| 2026-05-25 12:00 |
13:00:24.53 |
-00:59:34.7 |
HIP 63453 |
12.33 |
| 2026-05-26 00:00 |
13:00:18.72 |
-00:58:36.2 |
HIP 63453 |
12.86 |
| 2026-05-26 12:00 |
13:00:13.06 |
-00:57:38.8 |
HIP 63453 |
13.58 |
| 2026-05-27 00:00 |
13:00:07.56 |
-00:56:42.7 |
HIP 63453 |
14.45 |
| 2026-05-27 12:00 |
13:00:02.21 |
-00:55:47.8 |
HIP 63453 |
15.42 |
| 2026-05-28 00:00 |
12:59:57.01 |
-00:54:54.0 |
HIP 63453 |
16.47 |
| 2026-05-28 12:00 |
12:59:51.97 |
-00:54:01.5 |
HIP 63453 |
17.58 |
| 2026-05-29 00:00 |
12:59:47.08 |
-00:53:10.1 |
HIP 63453 |
18.71 |
| 2026-05-29 12:00 |
12:59:42.34 |
-00:52:19.9 |
HIP 63453 |
19.86 |
| 2026-05-30 00:00 |
12:59:37.75 |
-00:51:30.9 |
HIP 63453 |
21.02 |
| 2026-05-30 12:00 |
12:59:33.32 |
-00:50:43.1 |
HIP 63309 |
20.57 |
| 2026-05-31 00:00 |
12:59:29.05 |
-00:49:56.4 |
HIP 63309 |
20.23 |
| 2026-05-31 12:00 |
12:59:24.93 |
-00:49:11.0 |
HIP 63309 |
19.98 |
| 2026-06-01 00:00 |
12:59:20.97 |
-00:48:26.7 |
HIP 63309 |
19.82 |
| 2026-06-01 12:00 |
12:59:17.16 |
-00:47:43.7 |
HIP 63309 |
19.75 |
| 2026-06-02 00:00 |
12:59:13.51 |
-00:47:01.8 |
HIP 63309 |
19.75 |