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) |
| 2026-09-20 00:00 |
11:40:18.59 |
+11:15:37.5 |
HIP 56947 |
4.62 |
| 2026-09-20 12:00 |
11:40:46.34 |
+11:13:16.3 |
HIP 56947 |
4.62 |
| 2026-09-21 00:00 |
11:41:14.11 |
+11:10:55.3 |
HIP 56947 |
11.19 |
| 2026-09-21 12:00 |
11:41:41.89 |
+11:08:34.4 |
HIP 56947 |
18.25 |
| 2026-09-22 00:00 |
11:42:09.69 |
+11:06:13.7 |
HIP 57163 |
19.67 |
| 2026-09-22 12:00 |
11:42:37.50 |
+11:03:53.2 |
HIP 57163 |
12.46 |
| 2026-09-23 00:00 |
11:43:05.32 |
+11:01:33.0 |
HIP 57163 |
5.28 |
| 2026-09-23 12:00 |
11:43:33.15 |
+10:59:12.9 |
HIP 57163 |
2.15 |
| 2026-09-24 00:00 |
11:44:01.00 |
+10:56:53.0 |
HIP 57163 |
9.25 |
| 2026-09-24 12:00 |
11:44:28.86 |
+10:54:33.3 |
HIP 57219 |
15.18 |
| 2026-09-25 00:00 |
11:44:56.73 |
+10:52:13.8 |
HIP 57219 |
17.83 |
| 2026-09-25 12:00 |
11:45:24.61 |
+10:49:54.5 |
HIP 57219 |
22.59 |
| 2026-09-26 00:00 |
11:45:52.51 |
+10:47:35.5 |
HIP 57219 |
28.41 |
| 2026-09-26 12:00 |
11:46:20.41 |
+10:45:16.7 |
HIP 57516 |
23.09 |
| 2026-09-27 00:00 |
11:46:48.32 |
+10:42:58.1 |
HIP 57516 |
17.38 |
| 2026-09-27 12:00 |
11:47:16.24 |
+10:40:39.8 |
HIP 57516 |
13.26 |
| 2026-09-28 00:00 |
11:47:44.18 |
+10:38:21.6 |
HIP 57516 |
12.43 |
| 2026-09-28 12:00 |
11:48:12.12 |
+10:36:03.8 |
HIP 57618 |
10.95 |
| 2026-09-29 00:00 |
11:48:40.07 |
+10:33:46.2 |
HIP 57618 |
7.82 |
| 2026-09-29 12:00 |
11:49:08.02 |
+10:31:28.8 |
HIP 57618 |
10.35 |
| 2026-09-30 00:00 |
11:49:35.99 |
+10:29:11.7 |
HIP 57618 |
16.06 |
| 2026-09-30 12:00 |
11:50:03.96 |
+10:26:54.9 |
HIP 57618 |
22.66 |
| 2026-10-01 00:00 |
11:50:31.94 |
+10:24:38.3 |
HIP 57734 |
20.77 |
| 2026-10-01 12:00 |
11:50:59.93 |
+10:22:22.0 |
HIP 57734 |
20.67 |
| 2026-10-02 00:00 |
11:51:27.92 |
+10:20:06.0 |
HIP 57852 |
22.23 |
| 2026-10-02 12:00 |
11:51:55.91 |
+10:17:50.3 |
HIP 57852 |
19.21 |
| 2026-10-03 00:00 |
11:52:23.91 |
+10:15:34.8 |
HIP 57852 |
18.70 |
| 2026-10-03 12:00 |
11:52:51.92 |
+10:13:19.7 |
HIP 57888 |
18.12 |
| 2026-10-04 00:00 |
11:53:19.93 |
+10:11:04.9 |
HIP 58049 |
17.48 |
| 2026-10-04 12:00 |
11:53:47.94 |
+10:08:50.4 |
HIP 58049 |
10.40 |
| 2026-10-05 00:00 |
11:54:15.96 |
+10:06:36.2 |
HIP 58049 |
4.03 |
| 2026-10-05 12:00 |
11:54:43.97 |
+10:04:22.3 |
HIP 58049 |
5.41 |
| 2026-10-06 00:00 |
11:55:11.99 |
+10:02:08.8 |
HIP 58049 |
12.14 |
| 2026-10-06 12:00 |
11:55:40.01 |
+09:59:55.6 |
HIP 58179 |
9.99 |
| 2026-10-07 00:00 |
11:56:08.03 |
+09:57:42.8 |
HIP 58207 |
3.57 |
| 2026-10-07 12:00 |
11:56:36.05 |
+09:55:30.3 |
HIP 58207 |
5.02 |
| 2026-10-08 00:00 |
11:57:04.07 |
+09:53:18.2 |
HIP 58207 |
11.94 |
| 2026-10-08 12:00 |
11:57:32.09 |
+09:51:06.5 |
HIP 58207 |
19.10 |
| 2026-10-09 00:00 |
11:58:00.10 |
+09:48:55.1 |
HIP 58393 |
16.80 |
| 2026-10-09 12:00 |
11:58:28.12 |
+09:46:44.1 |
HIP 58393 |
13.61 |
| 2026-10-10 00:00 |
11:58:56.13 |
+09:44:33.5 |
HIP 58393 |
13.90 |
| 2026-10-10 12:00 |
11:59:24.13 |
+09:42:23.3 |
HIP 58393 |
17.50 |
| 2026-10-11 00:00 |
11:59:52.13 |
+09:40:13.5 |
HIP 58393 |
22.89 |