메타데이터
| 항목 |
값 |
| Designation |
493P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-01-26T12:27:24.261120Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:27Z |
| Obs used |
1386 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
14.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2005-09-30T09:07:51.744000Z |
| Discovery magnitude (MPC) |
19.10 N |
| Discovery observatory (MPC) |
699 · Lowell Observatory-LONEOS |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-03-07.0000000 |
| e |
0.46281239 |
| q (au) |
3.822731 |
| a (au) |
7.116193 |
| i (deg) |
24.052948 |
| Ω (om, deg) |
1.355621 |
| ω (w, deg) |
83.556049 |
| M (ma, deg) |
210.340358 |
밝기
산란 + 전체 선형
$$
M_a = (5.250 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.250 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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 |
| 2024-08-02 |
2026-01-25 |
+6.1626 |
-3.719 |
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 |
09:32:40.52 |
+33:07:04.0 |
HIP 46753 |
11.64 |
| 2026-09-20 12:00 |
09:33:16.16 |
+33:04:45.7 |
HIP 46947 |
11.17 |
| 2026-09-21 00:00 |
09:33:51.68 |
+33:02:27.9 |
HIP 46947 |
3.40 |
| 2026-09-21 12:00 |
09:34:27.08 |
+33:00:10.6 |
HIP 46947 |
4.43 |
| 2026-09-22 00:00 |
09:35:02.36 |
+32:57:53.9 |
HIP 46947 |
12.15 |
| 2026-09-22 12:00 |
09:35:37.53 |
+32:55:37.7 |
HIP 46947 |
19.87 |
| 2026-09-23 00:00 |
09:36:12.58 |
+32:53:22.0 |
HIP 47223 |
15.94 |
| 2026-09-23 12:00 |
09:36:47.50 |
+32:51:07.0 |
HIP 47223 |
9.30 |
| 2026-09-24 00:00 |
09:37:22.32 |
+32:48:52.4 |
HIP 47223 |
6.02 |
| 2026-09-24 12:00 |
09:37:57.01 |
+32:46:38.4 |
HIP 47223 |
10.12 |
| 2026-09-25 00:00 |
09:38:31.58 |
+32:44:25.0 |
HIP 47223 |
16.85 |
| 2026-09-25 12:00 |
09:39:06.03 |
+32:42:12.2 |
HIP 47223 |
24.08 |
| 2026-09-26 00:00 |
09:39:40.35 |
+32:40:00.0 |
HIP 47483 |
24.24 |
| 2026-09-26 12:00 |
09:40:14.56 |
+32:37:48.4 |
HIP 47483 |
23.11 |
| 2026-09-27 00:00 |
09:40:48.65 |
+32:35:37.3 |
HIP 47483 |
24.35 |
| 2026-09-27 12:00 |
09:41:22.61 |
+32:33:26.9 |
HIP 47652 |
26.25 |
| 2026-09-28 00:00 |
09:41:56.45 |
+32:31:17.1 |
HIP 47652 |
19.75 |
| 2026-09-28 12:00 |
09:42:30.16 |
+32:29:07.9 |
HIP 47652 |
14.25 |
| 2026-09-29 00:00 |
09:43:03.76 |
+32:26:59.3 |
HIP 47714 |
7.74 |
| 2026-09-29 12:00 |
09:43:37.22 |
+32:24:51.4 |
HIP 47714 |
3.98 |
| 2026-09-30 00:00 |
09:44:10.56 |
+32:22:44.1 |
HIP 47714 |
8.95 |
| 2026-09-30 12:00 |
09:44:43.78 |
+32:20:37.4 |
HIP 47714 |
15.86 |
| 2026-10-01 00:00 |
09:45:16.87 |
+32:18:31.4 |
HIP 47955 |
18.85 |
| 2026-10-01 12:00 |
09:45:49.83 |
+32:16:26.1 |
HIP 47955 |
13.10 |
| 2026-10-02 00:00 |
09:46:22.66 |
+32:14:21.5 |
HIP 47955 |
9.69 |
| 2026-10-02 12:00 |
09:46:55.36 |
+32:12:17.5 |
HIP 47955 |
11.01 |
| 2026-10-03 00:00 |
09:47:27.94 |
+32:10:14.3 |
HIP 48082 |
9.27 |
| 2026-10-03 12:00 |
09:48:00.38 |
+32:08:11.7 |
HIP 48082 |
2.21 |
| 2026-10-04 00:00 |
09:48:32.69 |
+32:06:09.9 |
HIP 48082 |
5.12 |
| 2026-10-04 12:00 |
09:49:04.87 |
+32:04:08.8 |
HIP 48082 |
12.19 |
| 2026-10-05 00:00 |
09:49:36.92 |
+32:02:08.4 |
HIP 48082 |
19.27 |
| 2026-10-05 12:00 |
09:50:08.83 |
+32:00:08.7 |
HIP 48082 |
26.32 |
| 2026-10-06 00:00 |
09:50:40.61 |
+31:58:09.8 |
HIP 48082 |
33.34 |
| 2026-10-06 12:00 |
09:51:12.26 |
+31:56:11.6 |
HIP 48435 |
28.72 |
| 2026-10-07 00:00 |
09:51:43.76 |
+31:54:14.2 |
HIP 48435 |
23.72 |
| 2026-10-07 12:00 |
09:52:15.13 |
+31:52:17.6 |
HIP 48435 |
19.96 |
| 2026-10-08 00:00 |
09:52:46.37 |
+31:50:21.7 |
HIP 48435 |
18.19 |
| 2026-10-08 12:00 |
09:53:17.46 |
+31:48:26.6 |
HIP 48435 |
18.94 |
| 2026-10-09 00:00 |
09:53:48.41 |
+31:46:32.3 |
HIP 48435 |
21.93 |
| 2026-10-09 12:00 |
09:54:19.22 |
+31:44:38.9 |
HIP 48435 |
26.39 |
| 2026-10-10 00:00 |
09:54:49.89 |
+31:42:46.2 |
HIP 48740 |
21.36 |
| 2026-10-10 12:00 |
09:55:20.42 |
+31:40:54.3 |
HIP 48740 |
15.21 |
| 2026-10-11 00:00 |
09:55:50.80 |
+31:39:03.3 |
HIP 48740 |
9.88 |