메타데이터
| 항목 |
값 |
| Designation |
404P/Bressi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-10-24T23:24:20.805120Z |
| Orbit solution date (soln_date, UTC) |
2026-03-17T15:12:47Z |
| Obs used |
785 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-08-30.0000000 |
| e |
0.13286937 |
| q (au) |
4.135875 |
| a (au) |
4.769611 |
| i (deg) |
9.738129 |
| Ω (om, deg) |
260.353617 |
| ω (w, deg) |
167.853131 |
| M (ma, deg) |
320.167622 |
밝기
산란 + 전체 선형
$$
M_a = (6.383 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.383 |
| n |
6.000 |
| gf |
0.948 |
| gb |
-0.845 |
| k |
1.000 |
| δ90 |
8.833 |
| 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 |
| 2020-06-17 |
2023-10-23 |
+4.6292 |
-2.683 |
| 2023-11-08 |
2026-03-14 |
+0.5720 |
-0.604 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
11:11:57.95 |
-04:06:01.7 |
HIP 54781 |
21.74 |
| 2026-07-29 12:00 |
11:12:21.57 |
-04:07:56.8 |
HIP 54781 |
20.02 |
| 2026-07-30 00:00 |
11:12:45.26 |
-04:09:52.6 |
HIP 54781 |
20.15 |
| 2026-07-30 12:00 |
11:13:09.00 |
-04:11:49.1 |
HIP 54781 |
22.11 |
| 2026-07-31 00:00 |
11:13:32.80 |
-04:13:46.4 |
HIP 54781 |
25.50 |
| 2026-07-31 12:00 |
11:13:56.66 |
-04:15:44.3 |
HIP 54781 |
29.85 |
| 2026-08-01 00:00 |
11:14:20.58 |
-04:17:42.9 |
HIP 54781 |
34.80 |
| 2026-08-01 12:00 |
11:14:44.55 |
-04:19:42.1 |
HIP 55081 |
35.34 |
| 2026-08-02 00:00 |
11:15:08.58 |
-04:21:42.1 |
HIP 55081 |
32.27 |
| 2026-08-02 12:00 |
11:15:32.67 |
-04:23:42.7 |
HIP 55081 |
30.23 |
| 2026-08-03 00:00 |
11:15:56.81 |
-04:25:44.0 |
HIP 55081 |
29.44 |
| 2026-08-03 12:00 |
11:16:21.01 |
-04:27:46.0 |
HIP 55081 |
30.01 |
| 2026-08-04 00:00 |
11:16:45.26 |
-04:29:48.7 |
HIP 55081 |
31.88 |
| 2026-08-04 12:00 |
11:17:09.56 |
-04:31:52.0 |
HIP 55081 |
34.85 |
| 2026-08-05 00:00 |
11:17:33.92 |
-04:33:55.9 |
HIP 55210 |
32.34 |
| 2026-08-05 12:00 |
11:17:58.33 |
-04:36:00.5 |
HIP 55210 |
28.60 |
| 2026-08-06 00:00 |
11:18:22.79 |
-04:38:05.8 |
HIP 55210 |
25.92 |
| 2026-08-06 12:00 |
11:18:47.30 |
-04:40:11.7 |
HIP 55210 |
24.67 |
| 2026-08-07 00:00 |
11:19:11.86 |
-04:42:18.3 |
HIP 55210 |
25.07 |
| 2026-08-07 12:00 |
11:19:36.48 |
-04:44:25.4 |
HIP 55210 |
27.06 |
| 2026-08-08 00:00 |
11:20:01.14 |
-04:46:33.3 |
HIP 55210 |
30.34 |
| 2026-08-08 12:00 |
11:20:25.86 |
-04:48:41.7 |
HIP 55443 |
29.54 |
| 2026-08-09 00:00 |
11:20:50.62 |
-04:50:50.8 |
HIP 55527 |
29.07 |
| 2026-08-09 12:00 |
11:21:15.43 |
-04:53:00.5 |
HIP 55527 |
22.98 |
| 2026-08-10 00:00 |
11:21:40.29 |
-04:55:10.9 |
HIP 55527 |
17.21 |
| 2026-08-10 12:00 |
11:22:05.20 |
-04:57:21.8 |
HIP 55527 |
12.25 |
| 2026-08-11 00:00 |
11:22:30.15 |
-04:59:33.4 |
HIP 55527 |
9.51 |
| 2026-08-11 12:00 |
11:22:55.15 |
-05:01:45.5 |
HIP 55527 |
10.84 |
| 2026-08-12 00:00 |
11:23:20.19 |
-05:03:58.3 |
HIP 55527 |
15.23 |
| 2026-08-12 12:00 |
11:23:45.28 |
-05:06:11.6 |
HIP 55527 |
20.84 |
| 2026-08-13 00:00 |
11:24:10.41 |
-05:08:25.6 |
HIP 55527 |
26.93 |
| 2026-08-13 12:00 |
11:24:35.58 |
-05:10:40.1 |
HIP 55527 |
33.25 |
| 2026-08-14 00:00 |
11:25:00.80 |
-05:12:55.2 |
HIP 55727 |
38.11 |
| 2026-08-14 12:00 |
11:25:26.06 |
-05:15:10.9 |
HIP 55739 |
37.06 |
| 2026-08-15 00:00 |
11:25:51.36 |
-05:17:27.1 |
HIP 55739 |
35.85 |
| 2026-08-15 12:00 |
11:26:16.70 |
-05:19:44.0 |
HIP 55739 |
35.86 |
| 2026-08-16 00:00 |
11:26:42.08 |
-05:22:01.3 |
HIP 55739 |
37.11 |
| 2026-08-16 12:00 |
11:27:07.50 |
-05:24:19.3 |
HIP 55739 |
39.47 |
| 2026-08-17 00:00 |
11:27:32.96 |
-05:26:37.7 |
HIP 55996 |
42.12 |
| 2026-08-17 12:00 |
11:27:58.45 |
-05:28:56.8 |
HIP 55996 |
38.09 |
| 2026-08-18 00:00 |
11:28:23.98 |
-05:31:16.3 |
HIP 55996 |
34.89 |
| 2026-08-18 12:00 |
11:28:49.55 |
-05:33:36.4 |
HIP 55996 |
32.79 |
| 2026-08-19 00:00 |
11:29:15.16 |
-05:35:57.0 |
HIP 55996 |
32.01 |