메타데이터
| 항목 |
값 |
| Designation |
6P/d’Arrest |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-09-17T18:56:35.044800Z |
| Orbit solution date (soln_date, UTC) |
2022-11-23T09:15:27Z |
| Obs used |
1093 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
8.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-03-29.0000000 |
| e |
0.61267012 |
| q (au) |
1.354585 |
| a (au) |
3.497239 |
| i (deg) |
19.512431 |
| Ω (om, deg) |
138.937100 |
| ω (w, deg) |
178.106460 |
| M (ma, deg) |
333.960485 |
밝기
산란 + 전체 선형
$$
M_a = (14.690 + 3.915\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.690 |
| n |
3.915 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
| 2021-03-10 |
2021-07-17 |
-7.6930 |
+2.374 |
| 2021-07-17 |
2021-09-17 |
+39.7603 |
-6.394 |
| 2021-09-18 |
2022-04-02 |
-14.7809 |
-1.960 |
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 |
10:54:29.83 |
+15:24:21.3 |
HIP 53366 |
13.13 |
| 2026-07-29 12:00 |
10:54:52.98 |
+15:22:09.4 |
HIP 53366 |
10.48 |
| 2026-07-30 00:00 |
10:55:16.19 |
+15:19:57.2 |
HIP 53366 |
10.92 |
| 2026-07-30 12:00 |
10:55:39.48 |
+15:17:44.7 |
HIP 53366 |
14.19 |
| 2026-07-31 00:00 |
10:56:02.84 |
+15:15:31.9 |
HIP 53522 |
13.33 |
| 2026-07-31 12:00 |
10:56:26.28 |
+15:13:18.8 |
HIP 53522 |
8.37 |
| 2026-08-01 00:00 |
10:56:49.78 |
+15:11:05.4 |
HIP 53522 |
6.01 |
| 2026-08-01 12:00 |
10:57:13.35 |
+15:08:51.6 |
HIP 53522 |
8.75 |
| 2026-08-02 00:00 |
10:57:36.99 |
+15:06:37.6 |
HIP 53522 |
13.86 |
| 2026-08-02 12:00 |
10:58:00.70 |
+15:04:23.3 |
HIP 53522 |
19.58 |
| 2026-08-03 00:00 |
10:58:24.48 |
+15:02:08.7 |
HIP 53522 |
25.51 |
| 2026-08-03 12:00 |
10:58:48.33 |
+14:59:53.8 |
HIP 53616 |
30.18 |
| 2026-08-04 00:00 |
10:59:12.24 |
+14:57:38.7 |
HIP 53881 |
32.40 |
| 2026-08-04 12:00 |
10:59:36.22 |
+14:55:23.2 |
HIP 53881 |
26.99 |
| 2026-08-05 00:00 |
11:00:00.27 |
+14:53:07.5 |
HIP 53881 |
21.99 |
| 2026-08-05 12:00 |
11:00:24.38 |
+14:50:51.6 |
HIP 53881 |
17.77 |
| 2026-08-06 00:00 |
11:00:48.56 |
+14:48:35.3 |
HIP 53881 |
15.04 |
| 2026-08-06 12:00 |
11:01:12.81 |
+14:46:18.8 |
HIP 53881 |
14.66 |
| 2026-08-07 00:00 |
11:01:37.11 |
+14:44:02.0 |
HIP 53881 |
16.82 |
| 2026-08-07 12:00 |
11:02:01.48 |
+14:41:45.0 |
HIP 53881 |
20.75 |
| 2026-08-08 00:00 |
11:02:25.92 |
+14:39:27.8 |
HIP 53881 |
25.67 |
| 2026-08-08 12:00 |
11:02:50.41 |
+14:37:10.2 |
HIP 54113 |
22.83 |
| 2026-08-09 00:00 |
11:03:14.97 |
+14:34:52.5 |
HIP 54113 |
18.17 |
| 2026-08-09 12:00 |
11:03:39.59 |
+14:32:34.5 |
HIP 54113 |
14.83 |
| 2026-08-10 00:00 |
11:04:04.27 |
+14:30:16.3 |
HIP 54113 |
13.83 |
| 2026-08-10 12:00 |
11:04:29.01 |
+14:27:57.8 |
HIP 54103 |
13.51 |
| 2026-08-11 00:00 |
11:04:53.80 |
+14:25:39.1 |
HIP 54103 |
14.38 |
| 2026-08-11 12:00 |
11:05:18.66 |
+14:23:20.3 |
HIP 54103 |
17.73 |
| 2026-08-12 00:00 |
11:05:43.58 |
+14:21:01.2 |
HIP 54299 |
12.72 |
| 2026-08-12 12:00 |
11:06:08.55 |
+14:18:41.9 |
HIP 54299 |
6.26 |
| 2026-08-13 00:00 |
11:06:33.58 |
+14:16:22.3 |
HIP 54299 |
0.78 |
| 2026-08-13 12:00 |
11:06:58.66 |
+14:14:02.6 |
HIP 54299 |
6.82 |
| 2026-08-14 00:00 |
11:07:23.80 |
+14:11:42.8 |
HIP 54299 |
13.33 |
| 2026-08-14 12:00 |
11:07:49.00 |
+14:09:22.7 |
HIP 54383 |
18.12 |
| 2026-08-15 00:00 |
11:08:14.25 |
+14:07:02.4 |
HIP 54516 |
17.66 |
| 2026-08-15 12:00 |
11:08:39.55 |
+14:04:42.0 |
HIP 54516 |
11.37 |
| 2026-08-16 00:00 |
11:09:04.90 |
+14:02:21.4 |
HIP 54516 |
5.73 |
| 2026-08-16 12:00 |
11:09:30.31 |
+14:00:00.6 |
HIP 54516 |
4.82 |
| 2026-08-17 00:00 |
11:09:55.77 |
+13:57:39.7 |
HIP 54516 |
10.04 |
| 2026-08-17 12:00 |
11:10:21.27 |
+13:55:18.6 |
HIP 54516 |
16.32 |
| 2026-08-18 00:00 |
11:10:46.83 |
+13:52:57.4 |
HIP 54516 |
22.80 |
| 2026-08-18 12:00 |
11:11:12.44 |
+13:50:36.0 |
HIP 54516 |
29.37 |
| 2026-08-19 00:00 |
11:11:38.10 |
+13:48:14.5 |
HIP 54711 |
30.86 |